What is the access code that unlocks mars mission alien ops?
there is no code for alien ops you mainly have to enter 'theylive' all the time.
You know that there might be is a cheat for the alien ops. There is, since you can't find the alien ops on the menu, there is a cheat for the alien ops. The cheat is Theylive.If you wanted to know astro ops cheats,here they are, they are Drill,- [First Astro Op] Cavein- [second astro Op] and Jacks [third Astro Op.]