This game jam is for making your own OSR game system. To qualify for submission, your game must be: 

• small: 5000 words or less in length
• weird: (focusing solely on the mechanical aspect) do things as differently from D&D as possible
• OSR: despite their weirdness, they must remain compatible with adventure modules, hexcrawls, dungeons and so on from at least one version of D&D

In your game's description on Itch, please describe its weirdness and which edition of D&D it is compatible with