So I am seriously considering making a spoof of Arcanum using the AGS engine. Are spoofs legal? Facts: I will not charge any money whatsoever for the game. It will be made for fun and amusement. I will not take credit for the ideas of Arcanum. I will acknowledge Arcanum as the intellectual property of Sierra/Troika. I won't use original game files. I will redraw characters/items/backgrounds in a playful 2D cartoon style, add my own voiceovers and dialog. It will loosely follow the main storyline of Arcanum. Sorry if I am not being clear, English is not my first language.
It should be okay, in your case, I think. Look at Conter-Strike 2D, for example. They made completely new game from existing commercial game, without getting suited or anything. :thumbup: