The first cheat code should be entered at the Main Menu.

The following 2 cheat codes should be entered while the game is paused. (For best results, at the very start of each mission).

Code Effect

Hold LT and RT and press X-LB-RB-Y(2)-RB-LB-X at the Main Menu All Missions and Planes Unlocked
Pause Game, hold LT, then quickly press X-Y(2)-X. Then hold RT and quickly press Y-X(2)-Y God Mode
Pause Game, hold LT and quickly press LB(2)-RB. Then hold RT and quickly press RB(2)-LB Increased Damage with all Weapons

Complete each achievement to get the allotted gamerscore.

Ace (35) Obtain the Ace rating in at least 5 missions of the single player campaign.
Ace for a Day (10) Obtain the Ace rating in at least one mission of the single player campaign.
Ace of Aces (50) Make 300 kills in adversarial multiplayer matches.

Complete Collection (15) Unlock all the planes in the single player campaign.
Completist (30) Accomplish all secondary objectives in all the single player campaign missions.
Curiosity Satisfied (15) Play at least one match in every multiplayer mode.

Dominator (30) Make 15 kills in a row without dying, in a multiplayer match.

Excellent Team Play (30) Be part of the winning team in 25 squad matches.
Eye in the Back (15) Successfully use defensive weapons 50 times over the course of the campaign.

Good Finish (15) Finish a solo multiplayer match above mid-table.
Good Team Play (15) Be part of the winning team in 3 squad matches.
Great Streak (20) Make a killing streak of at least 12 kills.

Hardened Veteran (30) Play 50 hours online, in any multiplayer mode.
Healthy Finish (10) Finish a solo multiplayer match without being last on the table.

Mission 1 (15) Complete mission 1 of the campaign.
Mission 10 (15) Complete mission 10 of the campaign.
Mission 11 (15) Complete mission 11 of the campaign.
Mission 12 (15) Complete mission 12 of the campaign.
Mission 13 (15) Complete mission 13 of the campaign.
Mission 14 (15) Complete mission 14 of the campaign.
Mission 15 (15) Complete mission 15 of the campaign.
Mission 16 (15) Complete mission 16 of the campaign.
Mission 17 (15) Complete mission 17 of the campaign.
Mission 18 (15) Complete mission 18 of the campaign.
Mission 2 (15) Complete mission 2 of the campaign.
Mission 3 (15) Complete mission 3 of the campaign.
Mission 4 (15) Complete mission 4 of the campaign.
Mission 5 (15) Complete mission 5 of the campaign.
Mission 6 (15) Complete mission 6 of the campaign.
Mission 7 (15) Complete mission 7 of the campaign.
Mission 8 (15) Complete mission 8 of the campaign.
Mission 9 (15) Complete mission 9 of the campaign.

Nice Collection (15) Unlock 65% of the planes in the single player campaign.

Proven Pilot (30) Make 50 kills in adversarial multiplayer matches.

Showoff (10) Perform at least 25 stunts in the single player campaign.
Skilled Dogfighter (40) Make 150 kills in adversarial multiplayer matches.
Skirmish Advanced (15) Reach 50% in at least three skirmish missions in the coop mode.
Skirmish Explored (15) Reach 25% in all skirmish missions in the coop mode.
Skirmish Perfected (20) Reach 100% in at least two skirmish missions in the coop mode.
Strategist (10) Your wingmen score at least 50 kills over the course of the single player campaign.
Streak Master (50) Make three killing streaks of at least 15 kills.
Superb Team Play (50) Be part of the winning team in 50 squad matches.

Team Player (25) Respond to at least 25 requests from teammates in multiplayer.
Tech Expert (20) Acquire all technological advancements in the single player campaign.
Tech Sawy (10) Acquire at least two technological advancements in the single player campaign.
Top Finish (30) Finish a solo multiplayer match on the top of the table.

Versatile Pilot (20) Achieve multiplayer kills with at least 15 types of different aircraft.
Veteran (10) Play 25 hours online, in any multiplayer mode.

War Hero (25) All missions of the single player campaign completed.
Well Covered (15) Your turret gunners score 15 kills in the single player campaign.