Fear no more! If you have difficulty or problems getting Achievements to your Katana. I've found a site that gives a rough guide to achievements.
http://www.xbox360achievements.org/
TAKE NOTE. The Game finder is a little broken on the site. Please search the Game's name fully. etc. halo (Wrong) Halo 3 (Correct)
Go and find your game, click on it and it leads you to a funny page. Click on "Achievements Guide". It'll give a rough method of getting achievements, but there is a full list of it.
http://www.xbox360achievements.org/
TAKE NOTE. The Game finder is a little broken on the site. Please search the Game's name fully. etc. halo (Wrong) Halo 3 (Correct)
Go and find your game, click on it and it leads you to a funny page. Click on "Achievements Guide". It'll give a rough method of getting achievements, but there is a full list of it.