Tier One mode (Time Attack):Complete Campaign mode to unlock Tier One mode.Weapons:Reach the following levels in the specified class to unlock the corresponding weapons:Rifleman classLEVEL – WEAPONLevel 1 (Recruit) – Assault Rifle: Coalition M16A4, Opposing Force: AK-47 Level 2 (Regular) – Extra Magazine Level 3 (Expert) – Red Dot Scope Level 4 (Veteran) – Light Machine Gun: Coalition M249 (Mk.46 Mod 0), Opposing Force: Kalashnikov PKM Level 5 (Operator) – Suppressors Level 6 (Commander) – Open-Tip Ammunition Level 7 (Elite) – Long Range Combat Scope Level 8 (Tier 1 Recruit) – Muzzle Brake Level 9 (Tier 1 Regular) – F2000 Assault Rifle Level 10 (Tier 1 Expert) – Veteran Assault Rifle Level 11 (Tier 1 Veteran) – Veteran Light Machine Gun Level 12 (Tier 1 Operator) – Enemy Assault Rifle Level 13 (Tier 1 Commander) – Pistol Ammo Level 14 (Tier 1 Elite) – Enemy Light Machine Gun Level 15 (Tier 1 Warfighter) – Extra Grenade Special Ops classLEVEL – WEAPONLevel 1 (Recruit) – Carbine: Coalition Colt M4A1, Opposing Force: Kalashnikov AKS-74U Level 2 (Regular) – Extra Magazine Level 3 (Expert) – Red Dot Scope Level 4 (Veteran) – Combat Shotgun: Coalition Remington 870 MCS, Opposing Force Tula Arms TOZ-194 Level 5 (Operator) – Suppressors Level 6 (Commander) – Slugs/Open-Tip Ammunition Level 7 (Elite) – Long Range Combat Scopes Level 8 (Tier 1 Recruit) – Laser Sights Level 9 (Tier 1 Regular) – P90 PDW Level 10 (Tier 1 Expert) – Veteran Carbines Level 11 (Tier 1 Veteran) – Veteran Combat Shotguns Level 12 (Tier 1 Operator) – Enemy Carbine Level 13 (Tier 1 Commander) – Pistol Ammo Level 14 (Tier 1 Elite) – Enemy Combat Shotgun Level 15 (Tier 1 Warfighter) – Extra Grenade SniperLEVEL – WEAPONLevel 1 (Recruit) – Battle Rifle: Coalition M21, Opposing Force: Norinco NDM-86 (SVD) Level 2 (Regular) – Extra Magazine Level 3 (Expert) – Long Range Combat Scope Level 4 (Veteran) – Bolt-Action Sniper Rifles: Coalition M24, Opposing Force: Izhmash SV-98 Level 5 (Operator) – Laser Rangefinder Level 6 (Commander) – Open-Tip Ammunition Level 7 (Elite) – High Power Scopes Level 8 (Tier 1 Recruit) – Suppressors Level 9 (Tier 1 Regular) – G3 Battle Rifle Level 10 (Tier 1 Expert) – Veteran Battle Rifle Level 11 (Tier 1 Veteran) – Veteran Sniper Rifle Level 12 (Tier 1 Operator) – Enemy Battle Rifles Level 13 (Tier 1 Commander) – Pistol Ammo Level 14 (Tier 1 Elite) – Enemy Sniper Rifle Level 15 (Tier 1 Warfighter) – Extra Grenade Achievements:ACHIEVEMENT – HOW TO UNLOCK (Multiplayer) First rotation (15 points) – Play online for 15 minutes. (Multiplayer) Tour of Duty (15 points) – Play online for 2 hours. (Multiplayer) Heavy Fire Support (15 points) – Fire 1000 bullets in a round (awarded at end of round). (Multiplayer) Boot camp (15 points) – Play once as each class (min 2 min). (Multiplayer) Mission Training (15 points) – Play Combat Mission. (Multiplayer) Assault Training (15 points) – Play Team Assault. (Multiplayer) Secure Training (15 points) – Play Sector Control. (Multiplayer) Raid Training (15 points) – Play Objective Raid. (Multiplayer) Enlisted (15 points) – Reach level 2 in any class. (Multiplayer) Veteran (15 points) – Reach level 4 in any class. (Multiplayer) Triple Canopy (15 points) – Reach level 8 in one class. (Multiplayer) Mission Specialist (20 points) – Play two hours of Combat Mission. (Multiplayer) Assault Specialist (20 points) – Play two hours of Team Assault. (Multiplayer) Secure Specialist (20 points) – Play two hours of Sector Control. (Multiplayer) Raid Specialist (20 points) – Play two hours of Objective Raid. (Multiplayer) Forward Spotter (20 points) – Deploy a missile strike support action (awarded at end of round). (Multiplayer) Fire Controller (30 points) – Use each offensive support action once (awarded at end of round). (Multiplayer) Quartermaster (30 points) – Get 1000 support points. (Multiplayer) Tier 1 (35 points) – Reach top level in one class. (Multiplayer) High Achiever (40 points) – Be top 3 on the scoreboard ten times. (Single-Player) First Incision (15 points) – Complete First In. (Single-Player) Welcome to the TOC (15 points) – Complete Breaking Bagram. (Single-Player) Develop the Situation (15 points) – Complete Running with Wolves… (Single-Player) Unexpected Guests (15 points) – Complete Dorothy