Gamerscore points are given when you unlock achievements
In halo 3 you must get 950 Gamerscore.
Depends on what level You beat it on.
The only way you can "manipulate" your gamerscore is by fulfilling the requirements for achievements and thus acquiring them.
You must complete 49 achievements and/or get 1000 gamerscore in Halo 3 in order to get the Katana
It gives 255 gamerscore and 16 achievments
you need 49 achevments with halo 3
get a 1000 gamerpoints and 49 achievements. alot of times it glitches and you get it before that. u just need to be close to a 1000 gamerscore points.
You need all the Halo 3 Achievmentswhich is 1000/1000 Gamerscore for Halo Katana.
Get more than 1000 gamerscore AND have more than 50 achievments.
you need 49+ achievements and 1000 gamerscore off Halo3
You have to get 49 achievements first and they have to add up to 1000 or more gamerscore.
Yes, there is a Security armor in Halo 3, Only the head and shoulders are unlockable.To get the head, you need the gamerscore in Halo 3 to be 1000g/1000g. And for the shoulders, the gamerscore is variable from 700-800 for some reason. (Note: If you get the shoulders, there is a glitch that makes you lose them when you earn them, but don't worry, they return back.)I hope this is useful!