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Each playable species has its own unique weapon selection:

[edit] Human

The human's weapon selection is as follows:

• Combat knife
• M4A4 Pistol (Has an uncanny resemblance to the real-life Heckler & Koch Mk23 pistol.)
• Shotgun
• M41A Pulse Rifle
• M-92 Grenade launcher
• M56 Smart Gun
• M-6B Rocket Launcher
• M-90 Minigun
• WY-102 Sniper rifle
• M240 Flamethrower

Humans recover health by picking up medical packs, and can further protect against harm by picking up armor.

[edit] Predator

The Predator's weapon selection is as follows:

• Wristblades
• CombiStick
• Plasma Pistol
• Speargun
• Plasmacaster
• Smart disc
• Netgun
• Remote bombs

Predators also have a Medicomp device that allow them to heal themselves, and an Energy Sift device that allows them to recover energy for their equipment.

[edit] Alien

Aliens can only perform melee attacks with their claws, stunning tail whip, and via pounce attacks. However, this limited range of "weaponry" is augmented by impressive physical skills: they are able to climb walls at any inclination, and make better-than-human jumps. To heal, they must eat from the body of a Predator or human. This is done by clawing at the bodies of their opponents, with the most health coming from executing a successful head-bite of an opponent (this also works on corpses)which makes them very good in a campaign.