Yumina

Most AI roleplay sites work the same way: you write a paragraph, the bot replies, and ten messages later it forgets whether your character is holding a sword or sitting in a tavern. Yumina fixes this by bolting large language models onto an actual state-driven game engine. Instead of a plain text box, you get a web platform where narrative generation is synced with hard game variables—health bars, inventory lists, faction reputation, currency, and location flags.

Whereas typical roleplay platforms like CrushOn AI or RPDate revolve around conversational character cards, dialogue summaries, and basic affinity meters, Yumina operates as a programmable world engine. Every turn runs through a four-stage pipeline: the engine compiles the lorebook and active variables, the main LLM writes the story alongside hidden state directives, a secondary lightweight agent (Smart Tracking) calculates exact stat changes and fires off sound or background triggers, and the client renders a clean interface with updated numbers.

From the creation menu, you can spin up projects in five ways:

• Character Chat for classic one-on-one roleplay with a single persona.
• World Simulation for sprawling sandboxes with custom lore, factions, and dynamic events.
• Blank Project with default narration when you want to wire everything from scratch.
• Import World to upload an existing Yumina card package.
• AI Generation to produce character art, background scenes, cover illustrations, or music tracks right inside the studio.

For players, the catalog is packed with everything from anime and K-pop idol simulators to battle royales, fantasy dungeons, and unfiltered 18+ dark romance (unlocked by switching on the age-verified Limitless mode). You don't have to play solo, either: Multiplayer Rooms let friends jump into the same story using either free-speech input or strict host-controlled turn-based rounds. Long campaigns stay coherent thanks to background Session Memory & Story Summary compression, and you can fork parallel timelines from any message via Branching.

For creators and indie devs, Yumina goes surprisingly deep. You can wire deterministic Behaviors & Rules—triggers based on timers, cooldowns, or stat thresholds that swap conditional background music or unlock lore without burning tokens on an LLM call. If standard chat bubbles feel too cramped, you can override the root component using React/TSX to build custom HUDs, interactive maps, and inventory screens, or export the JSON World Spec to code complex mechanics in external tools like Cursor or Claude Code. Plus, creators keep 80% of the token revenue spent by players inside their worlds.