Looking for this manhwa. It has an op mc. He just returned from something (?). Many years has passed. And when he came back, the world is peaceful and the there's like an olympics that simulates what has happened before where countries compete.
I think you are talking about Superhuman Battlefield
Looking for this manhwa. It has an op mc. He just returned from something (?). Many years has passed. And when he came back, the world is peaceful and the there's like an olympics that simulates what has happened before where countries compete.