Use ray guns, grenades, and rocket launchers in a turn based fight against aliens.
Two teams take turns. Select a weapon by clicking the backpack icon. Move to position, aim and hold spacebar to set force. Some weapons require you to set aim. Mark your target with a red cross.
Arrow keys - aim
Spacebar - launch attacks
Enter - jump
G - grenade
R - rocket launcher
S - shatter grenade
Tab - toggle weapon menu / controls
Shift - temporary freelook
Backspace - unset target
ESC - ingame menu
Mouse - set target / weapon menu