LLM's are not predictable. The ZMachine plus any interpreter is. Also there are tons of libre licensed IF games out there, such as All Things Devour, Spiritwrak

LLM's are not predictable. The ZMachine plus any interpreter is. Also there are tons of libre licensed IF games out there, such as All Things Devour, Spiritwrak and a bunch more. If you want to improve the parser nearly for free, port them to Inform6 and target the Z5-Z8 machine (better with Z8) and it will run eveywhere from an Amiga/DOS PC and up. Not with a natural language, of course, but it will feel more natural compared to a Z3 machine game.