: A popular free-to-play fork that offers more freedom, custom content, and active moderation to prevent griefing on its own servers.

: Several free-to-play versions and mods based on the original code exist.

While the software is free, is sold to cover hosting and maintenance costs. One Hour One Life

The survival game (OHOL) can be downloaded for free under specific conditions, though official server access requires a purchase. Developed by Jason Rohrer, the game's code and assets were placed in the public domain , allowing it to be legally available as free software for those who wish to build it from the source or play on unofficial servers. How to Get One Hour One Life for Free

Because the game is public domain, there are several ways to access it without paying the standard fee: