the name of the game is the open land it is a open world game a guy follows you in a part of the game

the story starts at a home that is in the future and you have an evil twin and you don't know yet. You see some Zombies but they wont hart you becouse you are immune to every thing but your evil twin he has something you have no clue what it is it mite not be any thing and .your plan I set for you is in set and you can not stop?!