System Shock (the remake) with a cut-down version of the Ironman mod to provide randomization. It's only slight loot randomization so there's no major pathing changes but it's fun nonetheless.

I like randomizers. They add some additional replay value to already good games. I must've played through randomized Bloodstained a down times already – and twice that for Super Metroid. (And then there's the beautiful mess that is randomized Borderlands 2. I don't think I'm ever going to finish a run but man are they wild.)