[4] In 2005, the first game that Monolith developed in conjunction with Warner Bros. was The Matrix Online, which Sega helped co-publish.

The same year, they released their first self-published title (with no co-publishers), Friends: The One with All the Trivia, for Microsoft Windows and the PlayStation 2.

[8] In April 2008, they increased their stake to 35%, gaining distribution rights of all Eidos games in North America.

[9] On December 15, 2008, shortly after SCi changed their name to Eidos plc, Warner acquired a total of 10 million shares of the company, raising its owned amount to 19.92%, after an agreement which prevented Time Warner from acquiring more shares was scrapped one month earlier.

On February 12, 2009, Warner Bros. backed Square Enix's acquisition offer worth £84.3 million for Eidos plc as majority stakeholder.

[14] Terms of the deal were not disclosed, but the acquisition serves to strengthen the publisher's internal development effort.

Also in 2009, Warner purchased most of the assets of American publisher Midway Games, operating under Chapter 11 bankruptcy protection, for $49 million.

The assets purchased include Midway's studio in Chicago[15] and Surreal Software, resulting in the ownership to the rights to the Joust, Mortal Kombat, The Suffering, Spy Hunter and Wheelman series, as well as the library of the former Atari Games, which had previously been owned by Time Warner.

[16] Midway had previously worked with Warner Bros. on several games, including Mortal Kombat vs. DC Universe.

[19] On January 13, 2010, it was announced that WBIE would produce and gain exclusive rights to Sesame Street video games, starting in fall 2010 with Elmo's A-to-Zoo Adventure and Cookie's Counting Carnival.

Mortal Kombat was developed by the newly renamed NetherRealm Studios, led by series creator and creative director Ed Boon.

[40][41] However, in an August 2020 press release regarding an organizational restructuring, WarnerMedia stated that WBIE "remains part of the Studios and Networks group".

[44] In May 2021, AT&T announced that it was splitting off WarnerMedia for about $43 billion, where it would be merged with Discovery, Inc. As part of this sale, there were rumors that only portions of WBIE would be moved with the bulk of the other WarnerMedia properties,[45] but WBIE would be retained as Warner Bros. Games under the newly merged company named Warner Bros.

[51] In July 2024, the Screen Actors Guild-American Federation of Television and Radio Artists (SAG-AFTRA), a labor union of which numerous video game voice actors are members, would initiate a labor strike against a number of video publishers, including WB Games, over concerns about lack of A.I.