Player advancement is different depending on which team you are on. As a human, players are rewarded with credits for each alien kill. These credits may be used to purchase new weapons and upgrades from the "Armoury". The alien team advances quite differently. Upon killing a human foe, the alien is able to evolve into a new class. The more kills gained the more powerful the classes available.

The overall objective behind Tremulous is to eliminate the opposing team. This is achieved by not only killing the opposing players but also removing their ability to respawn by destroying their spawn structures.

Game features:
Flexible particle system - 99% of the in-game visual effects are configured using particle scripts.
16 buildable structures with in-game functions.
Play as several alien classes with unique abilities.
Customize your setup as a human and buy new weapons, armour and items.
Scale the walls and ceilings as an alien waiting for an unsuspecting human.
Realistic physics and motion - no bunny hopping or quick back peddling.
Flexible map system - animated mapobjects, triggering, light flares, etc.
Large weapons system - don't like the weapon you have? Sell it and buy a different one, dozens of options.

System requirements:
Windows 2000/XP
DirectX 9
2.4 GHz
512 MB RAM
64 MB Video