Mods and DLCs is a modern feature in gaming. But I am not sure it will work with old school games like Grimrock. Grimrock is not just hacking and slashing, it's after all puzzles. An I don't thing that fan based mods would add much to this. I would rather prefer a sequel, directly from the original development team. A trilogy would be ideal! And from what I remember every classic game (adventure or rpg) that had a sequel, this sequel superseded the first installment. (EOB, CSB, Baldur's Gate, Monkey Island, Day of the Tentacle), whenever the original team was involved in the sequel as well. So please, do not give the engine to the public please make a sequel!
What do other people think?