Natural Selection Alternatives

Doom

Doom is a science fiction horror-themed first-person shooter video game in which players assume the role of a space marine, popularly known as "Doomguy", who...

Features:

• First person view
• Single player
• First Person Shooter (FPS)
• Gaming
• Multiplayer
• Sci-fi

Unvanquished

Unvanquished is a free, open-source first-person shooter combining real-time strategy elements with a futuristic, sci-fi setting. It is available for Windows, Linux, and...

Features:

• First Person Shooter (FPS)
• Multiplayer
• RTS
• Sci-fi

Dead 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...

Tremulous

Tremulous is a free, open source game that blends a team based FPS with elements of an RTS. Players can choose from 2 unique races, aliens and humans. Players on both...

Features:

• First Person Shooter (FPS)
• RTS

Zandronum

Zandronum is a multiplayer oriented port, based off Skulltag, for Doom and Doom II by id Software. Zandronum brings classic Doom into the 21st century, maintaining...

Features:

• First Person Shooter (FPS)
• Free to play
• Gaming
• Multiplayer
• Online-Gaming
• Shooting
• Single player

Aliens vs Predator

Aliens vs. Predator is a science fiction first-person shooter video game, developed by Rebellion Developments

Features:

• First Person Shooter (FPS)
• Gaming
• Multiplayer
• Shooting
• Single player

DUSK

Battle through an onslaught of mystical backwater cultists, possessed militants & even darker forces as you attempt to discover just what lurks beneath the...

Features:

• First person view
• First Person Shooter (FPS)
• Gaming
• Single player

Wrack: Exoverse

Wrack: Exoverse is the follow-up to the 2014 first-person shooter Wrack. It was a very fast-paced, arcade-style game with heavy influences from classic shooters like...

Features:

• First Person Shooter (FPS)
• Gaming
• Multiplayer
• Sci-fi
• Shooting