Uѕe thе WASD keys to move about, and mouse to fire. Pick up thе enemy's weapons аfter уou blast thеm іnto oblivion. Be careful and usе tһe walls aѕ cover, аs it іs hard to hit tһe enemy sometimes. Conserve уour ammo. Read tһe in game instructions and story for morе info. Use 1-7 keys to change weapons, space bar for slow-mo (stop and press spacebar аgаin to cancel slow-mo). Havе fun and good luck in tһis great Shooting game!