Halo 3 gamerscore?

[Tyler D]

What are all of the tasks you need to do to get 1000 gamerscore points?

 

[-=Seta San=-]

http://www.xbox360achievements.org/achievements.php?gameID=274

 

[Derek M]

achievement_complete_mission_outskirts
achievement_complete_mission_voi
achievement_complete_mission_floodvoi
achievement_complete_mission_wasteland
achievement_complete_mission_citadel
achievement_complete_mission_highcharity
achievement_complete_mission_halo
achievement_complete_campaign_easy
achievement_complete_campaign_normal
achievement_complete_campaign_heroic
achievement_complete_campaign_legendary
achievement_find_outskirts_skull
achievement_find_voi_skull
achievement_find_floodvoi_skull
achievement_find_waste_skull
achievement_find_citadel_skull
achievement_find_highcharity_skull
achievement_find_halo_skull
achievement_jungle_training
achievement_jungle_no_casualties
achievement_floodvoi_no_flood_victims
achievement_spartan_recruit
achievement_spartan_graduate
achievement_spartan_officer
achievement_extra_crispy
achievement_banshee_surface_to_air_kill
achievement_triple_kill
achievement_killtacular
achievement_sticky_x5
achievement_brokeback
achievement_tripmine_vehicle_kill
achievement_flag_carrier_kill
achievement_kill_frenzy
achievement_triple_sword_kill
achievement_mongoose_splatter
achievement_melee_kill_x5
achievement_needler_kill_x5
achievement_sniper_kill_frenzy
achievement_headshot_kill_frenzy
achievement_full_warthog_kill
achievement_temporary_placeholder