There is no code that unlocks alien ops. You mainly have to enter 'theylive' all the time.
Do you mean the alien codes you put in on LEGO MARS MISSION game? If yes, then no, the codes aren't invalid. By Jontypin
It's theylive
The code for alien special operation levels are: 11 12 and 13 for the aliens.
The odd-looking glowing green markings in each level's preview video. The green markings are written in the alien language.
its an alien with a big head then a normal alien and then 2 boss aliens oh and how do you enter codes?
to beat it you need the cheat code:newbie
There are multiple codes, so you will have to figure it out manually.
Duncan Bulk:7127725
touch the crate near the rocket without getting killed
so many that not even god can count how many codes there is!
there is no code to alien ops you mainly have to enter 'theylive' all the time
It is 2010! Lego Mars Mission is gne so dont waste ur time trying to find it.