[anthk]

Sorry but Inform6, which itself is a distant cousin on methodology against ZIL and ZIL itself to Lisp, it's far better than CL for these kind of games.

The English (and Spanish library -grammar, object and token translations- with INFSP6) it's something else. Among Inform Beginners' Guide, with DM4.pdf you can set anything, even new grammars, or a Tetris, if you want to dwell into low-level Inform6 functions.

Inform6 gives you literal game objects and attributes for free. The most literal OOP language ever. And the generated ZMachine games/ROMs will run from a m68k Amiga to an Iphone.