they're similar games in many ways. movement/physics-based, fast-paced, distinctive characters/classes, bright and colorful, great sound design, humorous, fan-made competitive rules...
Oldschool Runescape for online MMO stuff cause of how much time I've spent on it and invested. I quit and have only logged back in a few times the past year though only to make sure I still have access to my account.
Noita is probably my favorite game right now even know I barely ever get a chance to play anything. That or modded New Vegas/TTW takes the cake.