Here are my go tos if I want to just let my mind wander and not think about what i do:

bullet hells

• vampire survivors
• brotato
• soulstone survivors
• 20 minutes till dawn
• bounty of one

emulated:

• pokemon leaf green/fire red
• zelda BOTW (small chunks possible. Do one shrine, explore a bit. Search for some koroks.) runs beautifully on yuzu

RPG:

• Dark souls 1 Remastered(Because the game practically saves every second or two you are not in any way committed to play a long time)