L1 / R1 for aiming and shooting, L2 is to switch to your alternate fire (i.e. the grenade launcher on your assault rifle or switch to an RPG if you're an engineer), R2 throws a grenade, L3 sprints, R3 is melee, X is jump, Square is reload, Triangle switches between your primary weapon and your sidearm, and Circle toggles whether you're standing or crouching (no prone).
Atotștiutorul Google.