The phrase "arc system" refers to a set of related actions or events that create a story or narrative. It is like a storyline or plot that follows a specific path or progression. Full definition
We got an enhanced port of the original PS2 game on the PlayStation Vita and to everyone's surprise, two fighting games developed by famed fighting game developer ARC System Works. (gamingunion.net)
This new puzzle game from ARC SYSTEM WORKS takes the classic puzzle game mechanic of matching at least three blocks of the same color together while creating chains of combos and adds a few twists. (backinmyplay.com)