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Design & ValidateToolSource availableFree
Ludii
A general game system whose Ludii game description language composes boards, pieces, turns, moves, and end conditions into immediately runnable rules, with built-in AI, self-play, and a concept database for analysis.
Visit official siteContent record updated Aug 1, 2026Official site reached automatically · Checked Aug 3, 2026
Why it’s here
Designers can implement abstract rule variants quickly, inspect legal play, playability, strategic depth, and recurring patterns, then decide which mechanics merit a physical or digital prototype.
Best fit
Prototype systems, stories, and interactions, then validate them with real players.
systems-designgame-designgame-ai
Before you commit
Its focus is discrete, turn-based, and combinatorial games rather than real-time action prototypes; source is published under CC BY-NC-ND 4.0 for noncommercial use, and the no-derivatives restriction does not meet the usual definition of open source.
