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class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Mike_O%27Brien" title="Mike O'Brien – Malagasy" lang="mg" hreflang="mg" data-title="Mike O'Brien" data-language-autonym="Malagasy" data-language-local-name="Malagasy" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Mike_O%E2%80%99Brien_(projektant_gier)" title="Mike O’Brien (projektant gier) – Polish" lang="pl" hreflang="pl" data-title="Mike O’Brien (projektant gier)" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9E%E2%80%99%D0%91%D1%80%D0%B0%D0%B9%D0%B5%D0%BD,_%D0%9C%D0%B0%D0%B9%D0%BA_(%D1%80%D0%B0%D0%B7%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D1%87%D0%B8%D0%BA_%D0%B8%D0%B3%D1%80)" title="О’Брайен, Майк (разработчик 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<div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=MPQ_(file_format)&redirect=no" class="mw-redirect" title="MPQ (file format)">MPQ (file format)</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Video game developer </div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output 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class="mbox-text-span">This <a href="/wiki/Wikipedia:Biographies_of_living_persons" title="Wikipedia:Biographies of living persons">biography of a living person</a> <b>needs additional <a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources">citations</a> for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help by adding <a href="/wiki/Wikipedia:Reliable_sources" title="Wikipedia:Reliable sources">reliable sources</a>. <a href="/wiki/Wikipedia:Biographies_of_living_persons#Remove_contentious_material_that_is_unsourced_or_poorly_sourced" title="Wikipedia:Biographies of living persons">Contentious material</a> about living persons that is unsourced or <a href="/wiki/Wikipedia:Reliable_sources#Questionable_and_self-published_sources" title="Wikipedia:Reliable sources">poorly sourced</a> <b>must be removed immediately</b> from the article and its talk page, especially if potentially <a href="/wiki/Wikipedia:Libel" title="Wikipedia:Libel">libelous</a>.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Mike+O%27Brien%22+game+developer">"Mike O'Brien" game developer</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Mike+O%27Brien%22+game+developer+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Mike+O%27Brien%22+game+developer&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Mike+O%27Brien%22+game+developer+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Mike+O%27Brien%22+game+developer">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Mike+O%27Brien%22+game+developer&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">August 2010</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox biography vcard"><tbody><tr><th colspan="2" class="infobox-above" style="font-size:125%;"><div class="fn">Mike O'Brien</div></th></tr><tr><th scope="row" class="infobox-label">Occupation(s)</th><td class="infobox-data role">President of <a href="/wiki/ArenaNet" title="ArenaNet">ArenaNet</a> (2000–2019)<br />Programmer at ManaWorks (since 2019)</td></tr></tbody></table> <p><b>Mike O'Brien</b> is the former president and co-founder of <a href="/wiki/ArenaNet" title="ArenaNet">ArenaNet</a> and executive producer of its games <i><a href="/wiki/Guild_Wars" title="Guild Wars">Guild Wars</a></i> and <i><a href="/wiki/Guild_Wars_2" title="Guild Wars 2">Guild Wars 2</a></i>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> He led the design and content creation teams of the original <i><a href="/wiki/Guild_Wars" title="Guild Wars">Guild Wars</a></i>.<sup id="cite_ref-Kalning_2-0" class="reference"><a href="#cite_note-Kalning-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Before co-founding ArenaNet, he worked as a company director and a lead programmer at <a href="/wiki/Blizzard_Entertainment" title="Blizzard Entertainment">Blizzard Entertainment</a> where he developed the <a href="/wiki/3D_rendering" title="3D rendering">3D rendering</a> engine of <i><a href="/wiki/Warcraft_III:_Reign_of_Chaos" title="Warcraft III: Reign of Chaos">Warcraft III: Reign of Chaos</a></i> and led the development of <i><a href="/wiki/Battle.net" title="Battle.net">Battle.net</a></i>. He also worked on <i><a href="/wiki/Warcraft_II:_Tides_of_Darkness" title="Warcraft II: Tides of Darkness">Warcraft II: Tides of Darkness</a></i>, <i><a href="/wiki/Diablo_(video_game)" title="Diablo (video game)">Diablo</a></i> and <i><a href="/wiki/StarCraft" title="StarCraft">StarCraft</a></i>, where he, among other things, designed and created the <a href="/wiki/MPQ_(file_format)" class="mw-redirect" title="MPQ (file format)">MPQ</a> archives used in all Blizzard games after Diablo. Mike O'Brien was featured as one of the most influential people in the <a href="/wiki/Video_game_industry" title="Video game industry">video game industry</a> on <i><a href="/wiki/PC_Gamer" title="PC Gamer">PC Gamer</a>'s</i> September 1999 cover story <i>"Game Gods"</i>. </p><p>O'Brien also previously developed an Apple II emulator for Windows, <a href="/wiki/AppleWin" title="AppleWin">AppleWin</a>, and old DOS ASCII game, <i>Pyro 2</i>. </p><p>In early October 2019, through the official Guild Wars 2 news page, O'Brien announced his departure from ArenaNet and his intention to start a new development studio.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> He is currently working as a programmer at the studio "ManaWorks".<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Mike_O%27Brien_(game_developer)&action=edit&section=1" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation journal cs1">"Studio Profile – ArenaNet". <i>Edge Magazine</i>: <span class="nowrap">132–</span>135. September 2011.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Edge+Magazine&rft.atitle=Studio+Profile+%E2%80%93+ArenaNet&rft.pages=%3Cspan+class%3D%22nowrap%22%3E132-%3C%2Fspan%3E135&rft.date=2011-09&rfr_id=info%3Asid%2Fen.wikipedia.org%3AMike+O%27Brien+%28game+developer%29" class="Z3988"></span></span> </li> <li id="cite_note-Kalning-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-Kalning_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFKalning2007" class="citation web cs1">Kalning, Kristin (28 March 2007). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20141210115802/http://www.nbcnews.com/id/17820122/ns/technology_and_science-games/t/guild-wars-experiment-worked/">"<span class="cs1-kern-left"></span>'Guild Wars': An experiment that worked"</a>. <a href="/wiki/MSNBC" title="MSNBC">MSNBC</a>. Archived from <a rel="nofollow" class="external text" href="http://www.nbcnews.com/id/17820122/ns/technology_and_science-games/t/guild-wars-experiment-worked">the original</a> on 10 December 2014<span class="reference-accessdate">. Retrieved <span class="nowrap">12 August</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=%27Guild+Wars%27%3A+An+experiment+that+worked&rft.pub=MSNBC&rft.date=2007-03-28&rft.aulast=Kalning&rft.aufirst=Kristin&rft_id=http%3A%2F%2Fwww.nbcnews.com%2Fid%2F17820122%2Fns%2Ftechnology_and_science-games%2Ft%2Fguild-wars-experiment-worked&rfr_id=info%3Asid%2Fen.wikipedia.org%3AMike+O%27Brien+%28game+developer%29" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.guildwars2.com/en/news/a-message-from-mike-obrien/">"A Message From Mike O'Brien"</a>. <i>GuildWars2.com</i>. 3 October 2019<span class="reference-accessdate">. Retrieved <span class="nowrap">22 April</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GuildWars2.com&rft.atitle=A+Message+From+Mike+O%27Brien&rft.date=2019-10-03&rft_id=https%3A%2F%2Fwww.guildwars2.com%2Fen%2Fnews%2Fa-message-from-mike-obrien%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AMike+O%27Brien+%28game+developer%29" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://mana.works/index.html#team">"ManaWorks Team"</a>. <i>mana.works</i><span class="reference-accessdate">. Retrieved <span class="nowrap">17 December</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=mana.works&rft.atitle=ManaWorks+Team&rft_id=https%3A%2F%2Fmana.works%2Findex.html%23team&rfr_id=info%3Asid%2Fen.wikipedia.org%3AMike+O%27Brien+%28game+developer%29" class="Z3988"></span></span> </li> </ol></div></div> <p><br /> </p> <style data-mw-deduplicate="TemplateStyles:r1271159938">.mw-parser-output .asbox{position:relative;overflow:hidden}.mw-parser-output .asbox table{background:transparent}.mw-parser-output .asbox p{margin:0}.mw-parser-output .asbox p+p{margin-top:0.25em}.mw-parser-output .asbox-body{font-style:italic}.mw-parser-output .asbox-note{font-size:smaller}.mw-parser-output .asbox .navbar{position:absolute;top:-0.75em;right:1em;display:none}.mw-parser-output :not(p):not(.asbox)+style+.asbox,.mw-parser-output :not(p):not(.asbox)+link+.asbox{margin-top:3em}</style><div role="note" class="metadata plainlinks asbox stub"><table role="presentation"><tbody><tr class="noresize"><td><span typeof="mw:File"><a href="/wiki/File:Crystal_personal.svg" class="mw-file-description"><img alt="Stub icon" src="//upload.wikimedia.org/wikipedia/en/thumb/2/24/Crystal_personal.svg/25px-Crystal_personal.svg.png" decoding="async" width="25" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/2/24/Crystal_personal.svg/38px-Crystal_personal.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/2/24/Crystal_personal.svg/50px-Crystal_personal.svg.png 2x" data-file-width="70" data-file-height="70" /></a></span></td><td><p class="asbox-body">This biographical article relating to a <a href="/wiki/Video_game" title="Video game">video game</a> specialist is a <a href="/wiki/Wikipedia:Stub" title="Wikipedia:Stub">stub</a>. 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developer)</span></div> </div> </div> <div class="vector-sticky-header-end" aria-hidden="true"> <div class="vector-sticky-header-icons"> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-talk-sticky-header" tabindex="-1" data-event-name="talk-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbles mw-ui-icon-wikimedia-speechBubbles"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-subject-sticky-header" tabindex="-1" data-event-name="subject-sticky-header"><span class="vector-icon mw-ui-icon-article mw-ui-icon-wikimedia-article"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-history-sticky-header" tabindex="-1" data-event-name="history-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-history mw-ui-icon-wikimedia-wikimedia-history"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only mw-watchlink" id="ca-watchstar-sticky-header" tabindex="-1" data-event-name="watch-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-star mw-ui-icon-wikimedia-wikimedia-star"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-edit-sticky-header" tabindex="-1" data-event-name="wikitext-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-wikiText mw-ui-icon-wikimedia-wikimedia-wikiText"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-ve-edit-sticky-header" tabindex="-1" data-event-name="ve-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-edit mw-ui-icon-wikimedia-wikimedia-edit"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-viewsource-sticky-header" tabindex="-1" data-event-name="ve-edit-protected-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-editLock mw-ui-icon-wikimedia-wikimedia-editLock"></span> <span></span> </a> </div> <div class="vector-sticky-header-buttons"> <button class="cdx-button cdx-button--weight-quiet mw-interlanguage-selector" id="p-lang-btn-sticky-header" tabindex="-1" data-event-name="ui.dropdown-p-lang-btn-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-language mw-ui-icon-wikimedia-wikimedia-language"></span> <span>4 languages</span> </button> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive" id="ca-addsection-sticky-header" tabindex="-1" data-event-name="addsection-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbleAdd-progressive mw-ui-icon-wikimedia-speechBubbleAdd-progressive"></span> <span>Add topic</span> </a> </div> <div class="vector-sticky-header-icon-end"> <div class="vector-user-links"> </div> </div> </div> </div> </div> <div class="mw-portlet mw-portlet-dock-bottom emptyPortlet" id="p-dock-bottom"> <ul> </ul> </div> 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