For me personally it’s always been Spider-Man.
Death Stranding
Any elder scrolls or fallout 3+ game. You’d set a destination but then get sidetracked by everything that pops up on your compass.
Gta5
Back in the day: GTA III, just cruising around. It always escalated quickly.
Osu
Skyrim, but then I forget to go back home and walk forever
Wed-swinging around New-York.
Playing warframe. Just messing around is always fun.
The video game equivalent for most people would be getting on a hardcore PvP game and getting killed and then complaining it’s not relaxing enough
Garry’s Mod, just going around slowly exploring source maps alone and being immersed in the ambiance of some of them.
Playing rouge likes
taking off from Burbank and flying around LA in MSFS
Minecraft
Seconded for Spider-Man. Recently, though, its been Hitman: WoA. I can hop into Freelancer mode and do one or two missions (or fail spectacularly, but whatever) and its pretty relaxing.
Just cause 2 with superman mod, inf ammo and health and free quick vehicle spawning. Just flying around the map and firing off two grenade launchers at everything.