I know of all sorts of indie games that haven't received the attention they probably deserve, including two of 2019's best games:
Smile For Me and
Bug Fables: The Everlasting Sapling.
Smile For Me is a first-person adventure game where you're in a compound filled with unhappy people and have to make them happy (using only found items and your ability to nod and shake your head using your mouse) before some uncertain fate befalls them. Very weird and funny, with just a dash of creepy.
Bug Fables is inspired by the original Paper Mario, but with an expanded scope. The characters are better, the game lasts 40+ hours with almost none of that being wasted time, the soundtrack and art are great across the board, and the whole thing is remarkably polished and charming. I'm blown away that it isn't on GOG.
Outside of indie games, the Deception series. I have trouble getting into Deception: Invitation to Darkness because its first-person view makes the gameplay unnecessarily difficult, and Deception IV is fan service garbage that's filled to the brim with gimmickry, but Kagero: Deception II, Deception III: Dark Delusion, and Trapt are all tons of fun. You set up traps and then murder innocent people (usually on behalf of the devil, willingly or not) with them. It's weirdly engaging.