Minecraft (Creative, Co-op)
Creative mode's appeal translates immediately regardless of gaming experience. You build things together. There is no death, no combat, no performance evaluation. Non-gamers find spatial creativity immediately accessible because it maps onto real-world analogues. The social aspect of shared construction projects creates engagement that does not require any pre-existing game literacy.
Lethal Company
The chaos is the feature. Non-gamers encountering Lethal Company's horror-comedy scavenging for the first time often produce the most entertaining sessions: the panic is genuine, the communication is frantic, and the proximity voice chat creates moments that need no gaming context to be hilarious. The game's simplicity — explore building, collect scrap, escape — is immediately legible.
Fortnite (Zero Build, Duos)
The learning curve is low enough that a non-gamer can contribute meaningfully within one session. Zero Build mode removes the most alienating mechanical requirement; gathering materials and driving vehicles are intuitive tasks. Even losing is brief enough not to be discouraging.