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Tremulous is a free, open source team-based FPS licensed under the GPL, and it uses the Quake III ioquake3 source code distribution. Reminiscent of Natural Selection and the Quake 2 modification Gloom, the game mixes pure FPS with RTS elements, and matches take place between two opposing teams: humans and aliens. Rather than relying on pure action, you can build constructions and activate upgrades that are unlocked gradually while playing.

Each team is fundamentally different. Humans use guns while aliens are class-based and rely on speed and melee attacks. By killing foes, aliens earn frags that can be used to evolve to stronger mutations. Humans, on the other hand, either spawn with a weapon or a construction kit, and they earn credits by killing aliens. Those credits can be exchanged in the armoury for new equipment. When a team reaches a set amount of frags, a new stage of development is occupied. Aliens get access to advanced creatures with healing and construction abilities, while humans acquire new building options, better weapons and stronger armour. There are three stages in total.

Each race has important constructions that must be defended. For the aliens, the Overmind is vital. It controls the production of eggs and the upgrade abilities. Humans have a Reactor as a main power source. There are additional defensive constructions such as barricades, alien tubes and turrets, or hives, eggs and telenodes as extensions of the main structures. These have distinct abilities as well. In an advanced development stage, aliens can build them on walls or ceilings, and they slow down humans with creep, or spray acid when destroyed. The overall objective is to destroy the opposing team.

The game was originally developed as a total conversion for Quake III, but later, after the release of the 3D engine's source code, turned into a standalone product. It supports OpenAL with surround sound.


Tremulous Windows Creating a local server.
Tremulous Windows Placing an alien acid tube (kind of defence turret).
Tremulous Windows Map loading screen
Tremulous Linux humans found an impenetrable base

Promo Images

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Part of the Following Group

User Reviews

Nice atmosphere, different player classes, but not much longevity. Windows merrick79 (7)

Critic Reviews Windows Jun 29, 2006 10 out of 10 100
Abandonia Reloaded Linux Jun 11, 2009 4.8 out of 5 96
Abandonia Reloaded Windows Jun 11, 2009 4.8 out of 5 96 Windows Apr 18, 2006 93 out of 100 93 Windows Mar 14, 2010 9 Stars9 Stars9 Stars9 Stars9 Stars9 Stars9 Stars9 Stars9 Stars9 Stars 90 Windows Jul 25, 2008 15 out of 20 75
Meristation Windows Feb 11, 2007 7 out of 10 70
Clubic Windows Apr 06, 2006 3.5 Stars3.5 Stars3.5 Stars3.5 Stars3.5 Stars 70
Clubic Linux Apr 06, 2006 3.5 Stars3.5 Stars3.5 Stars3.5 Stars3.5 Stars 70
Softonic Windows 2006 3.5 Stars3.5 Stars3.5 Stars3.5 Stars3.5 Stars 70


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Tony J. White, previously involved with additions for Wolfenstein: Enemy Territory, developed an unofficial Mac version and an administration tool for the game.

Related Web Sites

  • Tremulous (Official game website)
  • (Tony J. White's Tremulous site with an administration tool and unofficial Mac OSX builds.)
  • Wikipedia (The Wikipedia article on Tremulous)
Contributed to by Sciere (738241)