We may be a part of computer game designed by some intelligent species and they may also be the character of another species. Elon Musk believes that we are simulation and he says there is 1 in a billion chance that we are not a simulation.
After 40 years our technology will be so much realistic that even we won't be able to distinguish between what is real and what is simulated. The character of the game may think the reality is the game. They won't know we are controlling them. They think they are free to move but we know we are controlling them.