Blastmud is a multi-player text-based post-apocalyptic game (MUD). It has player-vs-enemy and opt-in player-vs-player fighting. You can play it with a MUD client (or telnet), in your web browser, or on your Android device. Your aim is to survive and thrive in a harsh world filled with things that want to kill you.
Unlike many MUDs, Blastmud is completely Free / Open Source software (including content), and is written in Rust, with contributions from the community encouraged.