EToH, or eternal towers of hell, is a Roblox game that inspired EJT and many other things. It is an obby game, with obbies in towers, which have 10 100x100x100 floors (almost all of the time), usually stacked vertically, with various difficulties from easy to catastrophic (and the non canon horrific and unreal difficulties, where the human limit currently resides). Difficulties are basically divided into baseline, bottom, low, mid, high, and peak of each difficulty (there's some more stuff like bottom-low, mid-high in-between), and they also have ratings with easy having 1.00 to 1.99, medium having 2.00 to 2.99, hard having 3.00 to 3.99, difficult having 4.00 to 4.99, all the way up to unreal having 13.00 to 13.99. There are also steeples, with only 5 or 6 floors, mini towers, with 5 or 6, not 10, 20x20x20 floors, citadels, with more floors than usual, I believe 15-25 if I am correct, and obliesks, with 30+ floors (though may be classified as 30-50 or 30-99).
