Sekai: Play · Build · Remix

Sekai

About this app

Sekai is an AI-powered game creation platform designed for building custom mini games, interactive systems, and expressive character-driven experiences.
Instead of static content, Sekai lets anyone use AI to design gameplay, craft logic, shape characters, and create dynamic, replayable AI games without writing code.

AI-Assisted Game Creation
The core of Sekai is a flexible AI game design system.
Creators define goals, rules, loops, states, and outcomes. AI then helps organize these elements into complete, functioning structures.
Difficulty, pacing, transitions, and flow can be adjusted at any moment. The platform’s AI logic engine continuously maintains coherence, ensuring every mini game responds smoothly to player behavior and system conditions.

Advanced AI Characters
Characters are central to every experience.
Each character is controlled by AI decision-making, allowing them to react with expressive behavior instead of scripted lines.
Characters can manage timing, adapt to player signals, follow system rules, shift attitudes, trigger new sequences, or modify the flow of a mini game. This creates character-driven gameplay that feels responsive, alive, and constantly evolving.

Multi-Modal Interaction
Sekai supports multiple input types so each game can feel unique:
• Buttons, taps, and quick interactions
• Choice-based decisions
• AI chat with natural language input
• AI voice interaction with expressive responses
• Hybrid modes where touch, chat, and voice combine
AI interprets every type of input and maps it into state changes, reactions, or logic transitions inside the experience.

Adaptive AI Logic & Replayability
Games in Sekai aren’t fixed or linear.
AI reacts to player behavior—choices, timing, hesitation—and shifts sequences or difficulty on the fly.
Each run feels slightly different, making even small designs feel reactive and replayable.

Roleplay-Style Systems
Sekai blends roleplay-style behavior with game mechanics.
Characters can respond with contextual tone, expressive reactions, and conversational depth while still respecting the logic and rules defined by the creator.
This allows designers to merge interactive game systems with AI character expression, enabling new forms of gameplay that sit between story, simulation, and improvisational interaction.

Expanding Library of User-Made AI Games
As more creators publish their projects, the content library continually grows.
Users can browse mini games built with different systems, moods, and structures; copy a logic setup; swap characters; adjust rules; or rebuild entire flows.
Themes can range from experimental mechanics to challenges, strategy ideas, emotional interactions, atmospheric concepts, or purely creative designs—without locking creators into predefined use cases.

Built for Creativity, Exploration & Iteration
Sekai encourages experimentation.
You can begin with a simple interaction loop, attach a single character, then gradually expand into a multi-role structure with layered logic and expressive behavior.
Rules, character behavior, timing systems, and outputs can all be refined at any stage. AI handles the heavy technical work so creators can stay focused on creativity, gameplay expression, and iterative design.

Why people use Sekai
• Build mini games with AI
• Create adaptive AI games with dynamic outcomes
• Design expressive AI characters that react intelligently
• Add roleplay-style behavior to game systems
• Combine chat, voice, and classic controls
• Publish instantly and update anytime
• Play replayable, short-form AI experiences
• Explore a constantly growing library of user-made creations
Sekai is an AI-driven game creation and character interaction platform where AI logic, characters, and gameplay come together to create living, responsive experiences.
Discord: https://discord.gg/vGBbp6Bmh9
Reddit: https://www.reddit.com/r/sekai_multiverse/
TikTok: https://www.tiktok.com/@sekaiapp
Instagram: https://www.instagram.com/sekai_multiverse

Ratings and reviews

Not bad, but not perfect. Pros: It's completely free, the bots are pretty smart, and the avatar image generation is solid. Cons: Can't edit messages, can't edit your own bots after you make them, voices either sound weird or don't play at all, and most bots have a set roll for you so you can't chat as yourself or your own character (that's mostly an issue with other users, not the app).

The bots' memories are terrible. I tried several different stories/ characters but had the same issue. The app uses the same 3 voices & the music stops periodically. Characters can't even pronounce their names, are very hot and cold, indecisive, or completely unable to adapt. You end up in circles trying to progress your storyline further only for the entire thing to restart. It's a good idea and needs tweaking, maybe different voices too. Thankfully it's free.

I really do like it. but whats extremely upsetting is that the format is really tedious to use. sometimes it wont let u add all of the characters u want in a story, even if u put their names in. & how the "save" system works tends to throw me off. I dont know if Im using it wrong? but I cant save unless I finish a chapter, & even then, sometimes it will still delete that chapter entirely anyways even if its said its saved. I truly do love the app, but its just incredibly frustrating & tedious😞

What’s new

• Added Draft & Publish for JAM — save your JAM in drafts while creating
• Added JAM Search to quickly find content you like
• Added comments, likes, and creator profiles for following
• Added JAM Remix — customize any JAM and make it your own
• Bug fixes & performance improvements