A pseudonymous developer known as Jasonb has built a browser game that turns the Bitcoin mempool into an arcade shooter, and there is a real bounty waiting for whoever clears enough of it.
The game is called Mempool Space Invaders, a Space Invaders clone that pulls live transaction data directly from the Bitcoin blockchain. Every enemy falling toward your ship is a real, unconfirmed Bitcoin transaction. Shoot it down and the BTC value of that transaction gets added to your score. Miss it and your shields take damage. Lose all your shields and the run is over.
How the bounty actually works
The goal is straightforward on paper: be the first player to destroy a cumulative 10,000 BTC worth of transactions in a single run. Do that, post a screenshot of your game-over screen, and Jasonb will pay out a bounty of 10,000 satoshis, worth roughly $7.30 at current prices.
Here is the thing though. Reaching 10,000 BTC means shooting down the equivalent of approximately $730 million in real Bitcoin transactions. That is not a typo. Players in the Stacker News comments reported clearing around 70 BTC and 30 BTC respectively after extended play sessions, which is not remotely close to the target.
The developer laid out three realistic paths to winning. The first is pure skill and timing: play when large “whale” transactions happen to be broadcast on the blockchain, blasting high-value targets as they appear. The second is luck, catching a period of unusually heavy on-chain activity. The third, which Jasonb called “the people’s approach,” is to simply send yourself a 10,000 BTC transaction, wait for it to appear in the mempool, and shoot it.
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The developer noted that players who attempt to fake a winning screenshot deserve the bounty for the effort involved in pulling it off.
For anyone without $730 million sitting around, the developer cheekily suggested an alternative: two separate 5,000 BTC transactions broadcast close enough together to shoot both in the same game session. “Just make sure not to spend too much in fees, or you’ll eat up all your winnings,” they wrote.
The cost of continuing and what you actually risk
The game is free to start. If you lose and want to pick up where you left off rather than starting fresh, it costs 1,000 satoshis (about $0.73) to continue your previous run. That pay-to-continue mechanic is the only real financial exposure for most players, and it is a minor one.
The broader context here is that most Bitcoin-backed games pay out fractions of a cent per hour of play, often buried under video ads. Mempool Space Invaders at least makes the economics transparent: the bounty is small (10,000 sats), the challenge is enormous (10,000 BTC), and the developer is honest about both. Whether anyone actually claims it will depend almost entirely on on-chain activity and the patience of whoever happens to be playing at the right moment.
What this game actually represents
Beyond the novelty, the game is a genuinely clever piece of web3 design. Using live mempool data as game input means every session is different depending on what is actually happening on the Bitcoin network. A slow Sunday on-chain looks nothing like a period of high transaction volume, and that variance is baked directly into the difficulty.
First spotted by Protos and discussed on Stacker News, the game has drawn attention more for its concept than its prize size. The 10,000 sat bounty is more of a symbol than a serious financial incentive, which the developer seems fully aware of. The real hook is the mechanic itself: an arcade game where the enemies are real money moving through a real financial network.
For anyone curious about how the Bitcoin mempool works, or just looking for a novel way to spend a few minutes, the game is free to try. Check out the latest gaming news for more on web3 gaming experiments worth watching, and browse our latest reviews if you want coverage of games where the stakes are a little more conventional. Make sure to check out more: