Serial Cleaners is a stealth title set at the tail end of 1999, where 4 cleaners for the mob are exchanging tales about their careers. However, despite working separately, it seems like their jobs were more connected than they ever realized.
You play as each of these cleaners, going through the events that took place during their jobs. You'll clean up bodies, hack systems, and make the mob's dirty stains disappear overnight. All 4 characters have their own unique skills, from athleticism letting them climb fences, to mutilating bodies to make their disposal easier.
If you remember the nineties differently, their dirty work is the reason why.