The Wretched (Wretched and Alone)
A single-person journaling game, The Wretched by Chris Bisette/Loot the Room games is a great entry into solo TTRPGs. Using a deck of cards and a “tumbling block tower,” the system setup creates a tense and immediate scene with a sense of personal investment that puts you fully in the moment, even as you play alone. It also has a system reference document! You can take a look at the Wretched & Alone SRD and then explore the plethora of W&A games.
The Wretched, Chris Bisette/Loot the Room
Clever Girl, Matthew Gravelyn
By the Sounding Sea, Ella Martinez
Final Girl, Ex Stasis Games
Murder!, Catscratcher Studios
