About Obby: Pump Up Your Muscles! 1 per second

Obby: Pump Up Your Muscles! drops you into a prison gym where physical strength is everything. You begin as the scrawniest inmate on the block, but through relentless training you'll bulk up and climb the hierarchy. Hit the exercise stations—push-ups, pull-ups, sit-ups—and watch your physique transform in real time. Each rep adds muscle mass, and each kilogram earned brings you closer to the top. Between sets you'll need to refuel at the cafeteria to keep your energy up. The progression loop is satisfying: train hard, eat well, grow stronger, unlock new areas. If you enjoy incremental games with a physical twist, Poki Games has this one ready to test your dedication. Can you go from zero to hero behind bars?

How to play Obby: Pump Up Your Muscles! 1 per second

WASD – move
Space – jump
E – interact with equipment and food
Left mouse button – train
Mouse – look around
Mouse wheel – zoom
On-screen joystick (mobile) – move
Jump button (mobile) – jump
Tap (mobile) – train