It was all for research purposes she said.

Finally stopped lying to herself.

I don't want to be contrarian, but I don't like the concept.
The execution is great. The art is good and the design is good. It's got a unique suit -- between the ribbons in her hair, and how she uses red-over-black instead of black-over-red.
But I love Helltaker because of how it doesn't do the obvious joke. Lucifer the devil is a total loser who nobody respects, Modeus the succubus has no idea how to do her job, Justice and Judgement act like wardens from Heaven, Helltaker himself has to be the team dad instead of the orgy host. And for all her temptations, Azazel never actually falls