A whole bunch of games by Polish developers are available over at GOG right now, with some great discounts on The Witcher series, Vanishing of Ethan Carter, Frostpunk and Phantom Doctrine.
Tagged With serial cleaner
Briefly: Think Viscera Cleanup Detail, except it's a) set in the 1970s, b) a stealth game and c) played from an entirely different perspective. So maybe it's not much like Viscera Cleanup Detail at all. Except for the whole, you know, cleaning-up-gory-murder-scenes part.