Blastmud is a post-apocalyptic text-based MUD (multi-user dungeon) game about surviving in a harsh world that emerged after nuclear attacks took down a world-dominating oligarchy.
Consistent with its genre, everything is text based (no images), and you must type in commands to interact with it.
As well as on Android, you can also play it using the same username over telnet or another MUD client, or via the web (one device logged in at a time, but you can switch as often is convenient for you). The content varies slightly by platform to meet platform requirements.