Mini Metro is pretty minimalist. https://dinopoloclub.com/games/mini-metro/
For shooters, Superhot is something you could look into. It's a sort of time freezing, puzzle, shooter hybrid. Time only moves when you do.
Factorio is a really intersting strategy title. You build increasingly complex systems of conveyor belts and factories to refine resources so you can build things so you can build more conveyor belts and factories etc... . Your systems get progressively more complicated until you either build a rocket and escape the planet, or your beautiful complex mess comes crashing down around you.
Portal is just wildly creative in its puzzles and mechanics. And hilarious.
The Beginners Guide is a nice walking simulator if you want to get meta. Like really meta. Oh my god a video game about making video games.