2. Frozen Alien Corpse
We knew that there could be aliens in GTA V due to leaked 100% requirements list requiring Franklin to discover fallen spaceship parts. And Rockstar have gone all out with the extraterrestrial here. If the presence of a sunken spaceship deep underwater wasn't enough to sate your appetite, there's even a frozen alien corpse to be discovered. This can only be discovered once, in the first mission of the game where you have to escape from the cops after robbing the bank. If you ignore the mission prompts and veer off road and onto the frozen stream, look under the bridge, and youll locate this fascinating Easter Egg.