Start with the activity you want to share or repeat. These are editorial starting points, not a complete market survey or a store ranking.
Portal 2
Dedicated two-person puzzles
A puzzle partner needs patience; this is a different commitment from casual drop-in action.
Stardew Valley
Farm-centred shared routine
A routine can become a checklist if you try to optimise every task; agree on a pace when sharing a farm.
Terraria
Exploration and building
An open-ended sandbox asks you to set direction; it may not suit someone who wants a tightly guided story.
Vampire Survivors
Run-based action; local co-op available
The dense visual action may not suit players looking for a quiet screen or a long narrative.