Stairway to Heaven

Stairway to Heaven is an extremely long and difficult obby that allows anyone to place checkpoints, although with a 2 minute cooldown between placing checkpoints. Stairway to Heaven in Practice mode can not be tiered, you can take an hour to do each jump as a tier 3 Obbyist. However, Hardcore mode (no checkpoints) has been tiered and is listed under 21, this is the second or third hardest obby, whether you find Stoicism to be harder or not. The Trusses is still harder than this regardless. This obby has an enormous glitch skip that completely bypasses more than half the obby (as seen in This Video), but the tier is counted without that skip.