A ride that takes 10^20k years to complete in Roller Coaster Tycoon 2 [video]
Less than 48 hours after that video was published, OpenRCT2 patched their pathfinding algorithm to not prefer some directions more than others: https://www.youtube.com/watch?v=b-5aX2oLOgU.The GitHub commit message says it was just to mess up MarcelVos, the videomaker