There's a KISS Psycho Circus Interview on CheckOut Games offering a Q&A with some members of Third Law Interactive, including Mark Morgan (artist), David Namaksy (level designer) and Mike Maynard (programmer) about progress on their upcoming LithTech-engine first-person shooter based on Todd McFarlane's comic based on the (hopefully) made up exploits of the world's most made up rock band. Here's a quote from Artist Mark Morgan on KISS' level of involvement with the project:

KISS has given us liberty to direct Psycho Circus as we see fit. Gene has himself seen the game and was pleased with what we had done at that point in time. Obviously, with any license, there are certain guidelines that must be followed, but so far, nothing we've designed steps outside those boundaries. I assume it's safe to say that KISS will let us work freely unless we step on someone's toes, which we have no intention of doing.