I play indie games a bunch, here's my shortlist:
- Factorio (factory builder)
- Enter the Gungeon (bullethell top down shooter)
- Slay the spire (rougelike deckbuilder)
- Subnautica (underwater exploration/survival/base building) - nr 2 is in early access, publisher deal with Krafton so good for the devs they fucked up trying to get out)
- Megabonk (rougelike auto-shooting, 3d vampire survivors type)
- Outer Wilds (space mystery exploration)
- Chants of Senaar (language decoding)
- Return to the Obra Dinn (forensics)
- Dave the Diver (dive fishing/sushi serving)
- Celeste (2d platformer)
- Neon White (speedrunning FPS)
- Papers Please (soviet style document checking)
- Cuphead (metroidvania)
- Magic Archery (very short and solid incremental, free and unmonetized, very rare)
- Inscryption (deckbuilder)
- Schedule I (drug dealing sim)
- Hollow Night (2d platformer Soulslike)
- Hades (roguelite)
All of them are good and they're mostly different types of games. All are tons of fun to play and most of them have a very charming art style (schedule I, and Megabonk Notably lacking there)
Out of these the absolute favorites are Factorio, Outer Wilds, Return to the Obra Dinn.
Side note, very important you stick with Outer Wilds until you find a major secret, people sometimes bounce off it and miss out on a once in a lifetime gaming experience.