The Best 41 Doom Alternatives
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                                                    48 LikeBorderlands
Borderlands is a science fiction first-person shooter with RPG elements made with cel-shaded graphics (cartoonish).
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                                                    29 LikeAssaultCube
AssaultCube is a FREE, multiplayer, first-person shooter game, based on the CUBE engine. Taking place in realistic environments, with fast, arcade gameplay, it's addictive and fun! .
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                                                    18 LikeThe Lord of the Rings Online
The Lord of the Rings Online (LOTRO) is the first MMORPG set in the world of J.R.R. Tolkien's The Lord of the Rings. LOTRO takes place in a persistent online world and is free-to-play
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                                                    16 LikeDead Space
Dead Space is a survival horror third-person shooter video game for Microsoft Windows, PlayStation 3 and Xbox 360. The player controls Isaac Clarke (named after science fiction writers Isaac Asimov and Arthur C.
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                                                    13 LikeAlien Arena
alien arena is a free and opensource first-person shooter game that combines a 1950s-era sci-fi atmosphere with gameplay similar to quake , https://alternativein .
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                                                    9 LikeAliens vs Predator
Aliens vs. Predator is a science fiction first-person shooter video game, developed by Rebellion Developments
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                                                    8 LikePainkiller
The game is inspired by such classic titles as Quake and Doom, with the emphasis on killing large numbers of monsters. The game is divided into five chapters, each about five levels long.
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                                                    6 LikeEvol Online
The goal of this project is to create an ever evolving 2D MMORPG, constantly trimming the sails on the journey through the vast online world. The name, Evol Online, describes this effort to always adapt and explore new routes and ideas. .
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                                                    6 LikeDigital Paint: Paintball 2
Digital Paint: Paintball 2 is a Paintball game that started out as a mod for quake 2 but then took on a life of its own as an open source fps game with a global player and clan management system.
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                                                    6 LikeNatural Selection 2
Natural Selection 2 is a RTS/Shooter/Biter that you either play as marines or aliens, it is currently under development by Unknown Worlds.
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