Sven Co-op is a first-person shooter based on Half-Life, using its GoldSrc game engine. The standalone release, representing version 5.0 of the mod, was released in January 2016. In 2013, Valve, which owns the rights to the Half-Life series, gave the development team the rights to publish the modification as a standalone title on Steam, and further allowed them to distribute the maps and assets of Half-Life to support its release. Since its original release, the project has been overseen by David 'Sniper' McDermott. In addition to the cooperative gameplay, Sven Co-op includes improvements from the original Half-Life, including improved artificial intelligence for both enemy and allied non-player characters. The game, initially released as a mod in January 1999, and created by Daniel 'Sven Viking' Fearon, enables players to play together on online servers to complete levels, many which are based on the Half-Life universe but include other genres. Sven Co-op is a co-op variation of the 1998 first-person shooter Half-Life. GoldSrc (heavily modified), Svengine (v 5.0+)