Half-Life (Series)
Commercial
Half-Life is a series of first-person shooter video games that share a single science fiction alternate history.
Xonotic
Open Source
Xonotic is a free and open-source first-person shooter video game.
OpenArena
Open Source
OpenArena is a free and open-source video game, it is first-person shooter (FPS) and a video game clone of Quake III Arena.
AssaultCube
Open Source
AssaultCube (ActionCube) is a free and open source software first-person shooter video game.
Tremulous
Open Source
Tremulous is a free and open source team-based first-person shooter with real-time strategy elements.
Quake (series)
Commercial
Quake is a series of first-person shooter video games, starting with the game of the same name.
Borderlands (Series)
Commercial
Borderlands is a series of action role-playing first-person shooter video games in a space western/science fantasy setting.
Alien Swarm
Free
Alien Swarm is a freeware multiplayer top-down shooter video game.
The Lord of the Rings Online
Freemium
The Lord of the Rings Online is a massively multiplayer online role-playing game (MMORPG) for Microsoft Windows and OS X.
Alien Arena
Open Source
Alien Arena is a fast, free FPS deathmatch game.
Compare Doom (Series) with alternatives
Compare Half-Life (Series) and Doom (Series) and decide which is most suitable for you.
Compare Quake (series) and Doom (Series) and decide which is most suitable for you.
Compare Xonotic and Doom (Series) and decide which is most suitable for you.
Compare Borderlands (Series) and Doom (Series) and decide which is most suitable for you.
Compare OpenArena and Doom (Series) and decide which is most suitable for you.
Compare Alien Swarm and Doom (Series) and decide which is most suitable for you.
Compare AssaultCube and Doom (Series) and decide which is most suitable for you.
Compare The Lord of the Rings Online and Doom (Series) and decide which is most suitable for you.
Compare Tremulous and Doom (Series) and decide which is most suitable for you.
Compare Alien Arena and Doom (Series) and decide which is most suitable for you.