The travellers go to the Village Halloween Parade in New York in 1978, so they can see John Carpenter’s Halloween with an early audience as well. And the Stranger spots a familiar face in the crowd. And another. And another. Some of her alien enemies, mingling unnoticed and being praised for the quality of their masks and costumes...
For console. The Edge Of Reality, following The Edge Of Time VR game, starring 13 and 10 helping you save reality itself a million years in the future. No pressure.
For mobile devices, The Lonely Assassins, which looks like a classic adventure kind of game, searching for clues in photos and the like.
Someone trying to communicate through possession. A parent trying to save their child, even though the possessing being means no harm - but how do they communicate that?