PC: WASD move · Mouse aim/shoot · Right-click aim down sights · Shift sprint · Space jump · R reload · F buy/use/revive (hold) · V knife · Q or wheel swap · Tab scores Phone/tablet: left thumb moves (push far up to sprint), drag right side to look. Landscape works best.
Survive the rounds. Buy guns off the walls, open doors, turn on the power, grab perks, hit the Mystery Box, and upgrade your weapon in the Arsenal machine in the Lab.