There are various free-to-play games that reward players with real Bitcoin, typically in satoshis, which are the smallest unit of BTC. While the earnings are generally small, the recent rise in Bitcoin's price has made them more meaningful. These games often include video ads as part of their monetization, which is the trade-off for receiving free Bitcoin.

For example, Bitcoin layer-2 network Botanix launched its mainnet on July 1 alongside an educational browser game called Bitcoin 2100. Players complete quests to learn about Bitcoin and Botanix while earning satoshis, with partner quests planned to provide further rewards.

Another example is Bitcoin Miner, available on iOS and Android, where players build virtual mining operations for various cryptocurrencies, including some that don’t have mining in reality, like Solana. Despite mining fake coins in the game, players earn real Bitcoin rewards in the form of satoshis.

Overall, these games offer a way to stack small amounts of Bitcoin without spending money, just time and attention to ads.