itch.io

A genre focused on the lives of teenagers and young adults during their (potentially metaphorical) journey into adulthood, where the characters typically overcome obstacles to learn lessons about being an adult as they figure out what's most important to them.

Games that can be played alone

Focused on using its text, moreso than its visuals or audio, to tell the bulk of its story/plot. (Still can have great audio and visuals, though!)