How can I get the Katana armor in Halo 3 but with the 1000 gamerscore?

[thunderbolt]

I have 1130 gamerscore in Halo 3 and according to others, I should have the katana but I don't. What should I do?

 

[scratchedcd]

you need all of the first matchmaking achievements i.e. overkill, steppin razor, lee johnson memorial, etc. if you say your gamertag, i can tell you what you need and the best way to get it

 

[chris]

You need to have the original achievments with that came with the game, all the offline ones, as well as all the ones that are not map specific or map-pack specific