The Nearside Project
A sci-fi RPG of parallel earths¸ set among 13 parallel dimensions of the modern world caused by unknown forces. The ""variants"" (as the dimensions are called) are traveled by people known as ""Nearsiders""¸ who have a neural anomaly allowing them to find and penetrate the doorways between variants. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim"