If you want to be completely surprised by Halo 3, you should probably stop reading now, because diligent beta code diggers have been turning up all kinds of golden nuggets that may or may not be a part of the final game when it's released this September. Halo fan site 7th Columnist has made a couple of discoveries, and the first is a list of achievements that could give a picture of the single player levels. There are apparently rewards doled out for the completion of missions like "floodvoi," "citadel" and "halo." Check out the full list after the jump.

Then they've dug up some new armor types. There are several (interchangeable?) Spartan suits like the Cobra, Ninja, Intruder and Regulator. Elites will be sporting the Predator and Raptor. We're not sure what they look like, but early reports from our imaginations say "totally awesome." Again, all of this is just speculative ... but come on, it's a holiday! Just let yourself get excited.

Read -- Halo 3 Campaign levels and Achievements!
Read -- Halo 3 New Custom Armour Types

[Via Xbox 360 Fanboy]

achievement_complete_mission_jungle
achievement_complete_mission_base
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_jungle_skull
achievement_find_base_skull
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

This article was originally published on Joystiq.