![](https://www.mangago.me/images/loading1.gif)
Mechanics: Special Avatar --> Skeleton Hero, Game Abilities, Skills from prerequisite classes
Mechanics: Special Avatar --> Lich Overlord, Game Abilities, Game NPCs came to life
Mechanics: VRMMO, literally a virtual reality game world
Mechanics: VRMMO, literally a virtual reality game world
Mechanics: Game Abilities, knowledge of the game system allows for protagonist to be OP
Mechanics: Not really a game but the organization of it being a fleshed out company gives it the same vibe as a game system.
Mechanics: Game System, knowledge of the system gives protagonist an OP edge
Mechanics: Game Abilities, Player System, modern firepower in a fantasy setting
Mechanics: Death Game, Dungeon System, Clear The System Or Die
Mechanics: Otome Game, Affection Gauge, literal game
Gaikotsu Kishi-sama Tadaima Isekai e o Dekake-chuu