hackmud

"Hackmud" is a massively multiplayer puzzle game with both co-op and PvP elements, set in a cyberpunk-themed, text-based world. Navigate the abandoned future internet, uncover a complex narrative, and prove your worth in trials set by the governing super-intelligence. The game features phenomenal gameplay, a good story, and perfect music, but be prepared for some grinding. Note that it is a complex game with a dedicated community and active developer.