Stuff about XX-60 Speed: Beyond Fast (it has doubled speed of X-60) Can appear anytime past A-060. Spawn Chance: 1/60 (doesn't increase) XX-60 does the same of what A-60 & X-60 does, but stays in the current room for more than 4 seconds.
Credit to @chergsha for the a-60 spawn sound (i edited it). Interminable Rooms by @zvardin. A-60 and Rooms by nicorocks5555.
