Would you be interested in playing through my game/ARG, Oakley's World? It starts off with a nostalgic, virtual pet, unassuming Horror game (that has some lore elements, things to find and decode, etc.) and then continues on (via pieces of the description that, when put together and decoded, get you to the next piece of things).
The gameplay length varies (depending on how much of it you decide to do). If just the video game section, then an hour or so. If the whole ARG, 2 hours or so.
https://danielles-games.itch.io/oakleys-world