The second game in the series. An action-packed shooter with 6 new strategic game modes; including Team Deathmach, Capture the Flag and Undead Survival!

Default controls:

Mouse - Fire / Aim weapon
A - Move left
D - Move right
Space - Jump
Control - Crouch
E - Interact
Q or 1, 2, 3 - Switch weapons
R - Reload weapon
F - Use weapon attachment
G - Drop weapon
Z - Give orders to teammates
X - Open reinforcements menu
C - Open weapon classes menu

Controls can be changed in-game.