Inflate the balloon one pump at a time. Every pump pushes the multiplier higher — but each one also risks a burst that pops your whole stake. A discrete-step cousin of Crash: cash out before it goes bang.
Just for fun — virtual points, no real money. 18+
Pump is a press-your-luck balloon game. You set a bet (10–100 points) and start inflating. Each pump nudges the balloon a little bigger and bumps your running multiplier upward — but every single pump also carries a roughly 4% chance to burst. If the balloon pops, the round is over and your stake is gone. If it survives, you face the same choice again: pump once more for a higher multiplier, or stop and bank what you have.
The decision is the entire game. At any point you can cash out and collect bet × multiplier, or gamble it on one more pump. Because the burst chance is fixed per pump, the longer you go the more likely a pop becomes overall — yet each individual pump is independent, drawn by a cryptographic random generator in the spirit of provably-fair play. Surviving ten pumps does not make the eleventh safer. A fixed house edge keeps the multiplier a touch below the fair payout, which is why no "always pump to ×N" system wins over time. Think of Pump as a discrete-step relative of Crash: with virtual points it is a clean way to feel RTP and variance first-hand.
Here it's free, virtual points, to learn the mechanic. To play with real money, here are the casinos I test — affiliate links. 18+, play responsibly.
🔗 Affiliate links · 18+ · Gamble responsibly