Trine 2 is a side-scrolling action-adventure game developed by Frozenbyte, a Finnish independent game development company. The game was initially released in 2011 and later received a "Complete Story" version, which included all the DLCs and expansions. The "Repack Kaos" version you're referring to seems to be a repackaged version of the game, likely including all the content from the Complete Story edition, optimized or modified in some way by a group or entity named Kaos.