All the things that you can use SETV, ADDV, CHAR, etc. with! :D vaXX ovXX mvXX NAME k MAME k GAME k EAME k AVAR a i _P1_ _P2_ FROM VELX VELY But interestingly, not: POSX POSY ACCG Any others? :> And to be sure, all of them are readwrite, none are readonly nor writeonly? :> (See https://github.com/Creatures-Developer-Network/c2e-quirks/issues/25 and https://github.com/Creatures-Developer-Network/c2e-quirks/issues/26 that Verm figured out :3 )