Futuristic gaming / game-like dungeon conquering or building

but i think might develop into more fantasy fighting

game turned real life dungeon tower raiding
mc is pretty sadistic, almost psychotically obsessed with the game that i think he considers the trials he's experiencing as just the game... but it's the real world with people (although not always good) dying left and right... MC even sometimes puts his friends in mortal danger it concerning cause it seems he cannot get out of the thought that it's just a game...
also, the world order is coddling him in a sense that everything he remembers is righ