Can I get this achievement on co-op as well as on single player if i want to.? Spartan 107 05:20, 10 December 2007 (UTC)
yes, you can. I finished some levels that were too hard and boring to me with my friends. I sat back in the corner and watched the whole time and got credit for beating the mission. --
Blemo 
TALK • CONTRIBUTIONS • SERVICE RECORD • MESSAGE 05:45, 10 December 2007 (UTC)
Getting The Achievement for Completing the game on Legendary
Does anyone know if you actually have to complete every mission on Legendary as long as you have beaten them all on Normal or Heroic first? I mean can you just beat the last mission on Legendary and get crdit for the achievement?
Jayman526 17:25, 17 February 2008 (UTC)Jayman526