Habitica

Tasks and habits become a role-playing game: finishing a to-do list earns experience, gold, and drops that feed a character you can customise, and missed days cost you health. It includes party play, where small groups share a quest board, along with guilds, rewards, streaks, and recurrence rules for irregular schedules.

Teams use it to keep shared chores and onboarding steps visible, and individuals use it to make a routine stick.

Self-hosting keeps the game state and every task under your control; because the backup is a single database, restoring your characters takes minutes.