Name: Tyrant: - Stage needed to obtain: 3 - Cost: 5 Evos - Description: Provides a healing aura in which nearby aliens regenerate health faster than usual. Name: Advanced Dragoon - Stage needed to obtain: 3 - Cost: 4 Evos - Description: In addition to the basic Dragoon abilities, the Advanced Dragoon has 3 barbs which may be used to attack humans from a distance. Name: Dragoon - Stage needed to obtain: 1 - Cost: 3 Evos - Description: Possesses a melee attack and a pounce ability (can be used as an attack or a way to reach a remote area inaccessible from the ground. Name: Advanced Marauder: Stage needed to obtain: 2 - Cost: 3 Evos - Description: The Advanced Marauder has all of the abilities of the base Marauder including an area effect electric shock. This allows the Marauder to gather great speed in enclosed areas. Name: Marauder - Stage needed to obtain: 1 - Cost: 2 Evos - Description: Has a melee attack and the ability to jump off walls. Name:Advanced Basilisk - Stage needed to obtain: 2 - Cost: 2 Evos - Description: In addition to basic Basilisk abilities, the Advanced Basilisk sprays a poisonous gas which disorientates any nearby humans. Its melee attack is often most effective combined with the ability to grab its foes. Name: Basilisk - Stage needed to obtain: 1 - Cost: 1 Evo - Description: Able to crawl on walls and ceilings. Name: Dretch - Stage needed to obtain: 1 - Cost: 0 Evos - Description: Has a lethal bite and the ability to crawl on walls. Name: Advanced Granger - Stage needed to obtain: 2 - Cost: 0 Evos - Description: Similar to the base Granger, except that in addition to being able to build structures, it has a melee attack, a barb-spit attack, and the ability to crawl on walls.

Name: Granger - Stage needed to obtain: 1 - Cost: 0 Evos - Description: Responsible for building and maintaining all alien structures. The following list is of all of the available aliens for standard tremulous (excluding tremx, korx, and some other mods) with a brief description. Aliens gain evolution points by killing humans, and revert to either a dretch (tiny, spider like alien) or a granger (builder) upon death. The aliens main method of becoming more powerful is through the evolution system, in which they exchange evolution points for the ability to turn into a higher level class than they currently are.

In addition, larger aliens often accidentally run down smaller aliens while charging away from a fight with low health, making it imperative that the smaller aliens wallwalk while not actively in combat. Any more than two aliens working together is likely to result in a lot of team killing, due to the range at which aliens fight. Aliens tend to either work solo or in groups of two, waiting around corners for targets to tear into. The humans tend to travel in packs, because if they allow an alien to get in range, they have almost no chance of survival. They are also given the ability to purchase better armour as the Human Stage grows higher (the maximum stage is 3). The humans, conversely, have an arsenal of purchasable weapons, all of which but the painsaw and flamethrower have infinite range. In combat, aliens do far more damage and are far more mobile, but none of them have a decent long ranged attack, forcing them to get within inches of the humans to attack, an odd reversal of typical FPS play. Aliens in turn have boosters, acid tubes, trappers, barricades, and hives. Aside from those buildings, humans also have defense computers, tesla generators, machine gun turrets, armouries, and medistations, all which contribute to the team's defensive options. The second most important building is the Overmind/Reactor, which controls all buildings except for the eggs/telenodes, and if destroyed no further buildings can be constructed without first rebuilding the Controlling building. Telenodes and eggs are the most essential buildings for each team, as players cannot spawn without them, and if no one is alive and no spawns exist, the team loses.

Humans can only build on flat surfaces, or surfaces with less than a 45 degree angle, while aliens can build at any angle, even on the walls or ceilings. In tremulous, each team starts out with a base in which they can build on, using a construction kit(humans), or granger(alien builder).

Tremulous game 1080p