A cheeky new browser game is turning the Bitcoin mempool into a shoot-’em-up — and it actually pays out in sats. Mempool Space Invaders, first flagged by Protos and shared widely on Twitter, reframes live Bitcoin transactions as descending “whales” you must blast before they hit your ship. Each whale corresponds to a real unconfirmed transaction on the Bitcoin blockchain, and when you destroy one, the BTC amount of that transaction is added to your in-game score.
How it works
- Whales fall from the top of the screen in real time, representing mempool transactions. Miss a whale and your shields slowly decay until it’s game over.
- You can restart for free, or pay 1,000 sats (about $0.73 at current prices; 1 sat = 1/100,000,000 BTC) to continue a previous run and try to preserve your progress.
- The first person to shoot down a cumulative 10,000 BTC worth of transactions in the game will claim a bounty of 10,000 sats (roughly $7.30), offered by the pseudonymous developer Jasonb, per a Stacker News post.
Win condition: skill, luck — or enormous capital
Hitting the 10,000 BTC target (about $730 million at current prices) is intentionally extreme, so winning falls into three practical buckets:
- Skillful play and fortunate timing: big on-chain transfers can appear while you’re playing, letting you rack up large BTC values quickly — if you can survive the chaos.
- Paying to continue: keep playing through paid continues to extend runs and chase large totals.
- Broadcasting huge transactions to yourself: Jasonb openly suggested the most direct route: send a 10,000 BTC transaction to yourself (or two 5,000 BTC transactions broadcast close enough together) and then blast them in-game — a tactic that requires moving massive funds and careful fee management so you don’t erase the prize with fees.
Reality check and verification
Stacker News commenters reported modest tallies — one player destroyed about 70 BTC, another 30 BTC after 20 minutes — showing how difficult the task is without unusually large transactions. To claim the bounty, players must post a screenshot of their “game over” screen; the developer says if someone fakes that effort, the sats are “deserved.”
Context vs. other BTC games
Free-to-play Bitcoin games that promise on-chain rewards are not new, but most offer only tiny returns and often force players through ad-filled funnels to earn pennies’ worth of BTC per hour. Mempool Space Invaders trades that slow grind for a more viral, spectacle-driven mechanic — and a headline-grabbing but almost symbolic bounty.
Market backdrop
Bitcoin has climbed about 1.3% in the past 24 hours and is trading near $73,198, which nudges the in-game values upward. BTC is roughly 9.5% higher over the last week but still about 42% below its all-time high of $126,080.
Whether you want to test your arcade reflexes, chase a novelty bounty, or stage a multimillion-dollar stunt on the mempool, Mempool Space Invaders blends old-school gameplay with on-chain theatre — and a tiny sats prize to sweeten the spectacle.
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