Gears of War 2 Cheats - Xbox 360

Achievements
Complete each achievement to get the allotted gamerscore:

A Parting Gift (20) - Kill 10 enemies with a grenade while down but not out (any mode).
And the Horse You Rode in On (10) - Story progression in Act 5, Chapter 1.
Around the World, Again (30) - Win a multiplayer match on each map (any mode).
Artist of War (75) - Complete all campaign acts on Hardcore Difficulty.
Back to Basic (10) - Successfully complete the 5 lessons of multiplayer Training Grounds.
Beat the Meatflag (10) - Capture 10 meatflags in Submission (public).
Better Wrapped in Beacon (10) - Story progression in Act 4, Chapter 3.
Brumak Rodeo (10) - Story progression in Act 5, Chapter 4.
Collector (5) - Recover 5 collectibles (any difficulty).
Completionist (30) - Recover all 41 collectibles (any difficulty).
Crossed Swords (10) - Win 10 chainsaw duels (any mode).
Crowd Control (10) - Melee 10 enemies down with the Boomshield equipped (any mode).
Dirty, Dirty Horde (20) - Survive the first 10 waves of Horde (any difficulty, any map).
Does This Look Infected to You? (10) - Story progression in Act 5, Chapter 5.
Escort Service (10) - Story progression in Act 1, Chapter 4.
Freebaird! (10) - Story progression in Act 2, Chapter 5.
Friends with Benefits (50) - Complete all acts in co-op on any difficulty (Marcus or Dom).
Girl About Town (10) - Story progression in Act 1, Chapter 6.
Green as Grass (10) - Train the rook (any difficulty).
Guerilla Tactician (50) - Complete all campaign acts on Normal Difficulty.
Have Fun Storming the Castle (10) - Story progression in Act 4, Chapter 6.
Heartbroken (10) - Story progression in Act 2, Chapter 6.
Hoard the Horde (30) - Survive all 50 waves of Horde (any difficulty, any map).
It's a Trap! (10) - Story progression in Act 1, Chapter 2.
It's Good to be the King (10) - Win 10 rounds of Guardian as the leader (public).
Kick 'Em When They're Down (10) - Perform all 11 unique executions on a downed enemy.
Longitude and Attitude (10) - Story progression in Act 3, Chapter 3.
Once More, With Feeling (10) - Perform 30 perfect active reloads (any mode).
One-Night Stand (10) - Complete 1 chapter in co-op on any difficulty (Marcus or Dom).
Open Relationship (30) - Complete 10 chapters in co-op on any difficulty (Marcus or Dom).
Organ Grinder (10) - Kill 30 enemies with a cover mounted Mulcher (any mode).
Pack Rat (15) - Recover 20 collectibles (any difficulty).
Party Like It's 1999 (30) - Play 1999 rounds of multiplayer (any mode).
Photojournalist (10) - Submit a spectator photo.
Pound of Flesh (10) - Use a meatshield to save your life 10 times (any mode).
Said the Spider to the Fly (10) - Kill 10 enemies with a planted grenade (any mode).
Seriously 2.0 (50) - Kill 100,000 enemies (any mode).
Shock and Awe (10) - Kill 30 enemies with the heavy Mortar (any mode).
Smells Like Victory (10) - Kill 30 enemies with the Scorcher Flamethrower (any mode).
Standing Here, Beside Myself (10) - Win 3 matches of Wingman (public).
Suicide Missionary (150) - Complete all campaign acts on Insane Difficulty.
Takes a Licking (30) - Melee 30 Tickers (any mode).
Tanks for the Memories (10) - Story progression in Act 3, Chapter 4.
That Sinking Feeling (10) - Story progression in Act 2, Chapter 4.
There's a Time for Us (10) - Story progression in Act 4, Chapter 2.
Tourist of Duty (25) - Complete all campaign acts on Casual Difficulty.
Variety Is the Spice of Death (30) - Kill an enemy with every weapon in the game (any mode).
Water Sports (10) - Story progression in Act 3, Chapter 6.
You Are the Support, Son (10) - Story progression in Act 5, Chapter 2.
You Go Ahead, I'll Be Fine (10) - Win three matches of King of the Hill (public).

Additionally, there are seven new achievements:

Forged in the Fire (15) - Win a Wingman match on each of the 3 Combustible Map Pack maps.
Bound by a Shared Past (15) - Win a Wingman match on each of the 5 Flashback Map Pack maps.
More Mystery, Less History (15) - Win a multiplayer match on each of the 5 Flashback Map Pack maps (any mode except Wingman).
The Roof! The Roof! The Roof... (15) - Win a multiplayer match on each of the 3 Combustible Map Pack maps (any mode except Wingman).
Trial by, and on, Fire (20) - Survive first 10 Horde waves on Combustible Map Pack maps as a team.
Skeletons in your Closet (20) - Complete waves 1 through 10 on all Flashback Map Pack maps in Horde (any difficulty).
Annex: Now With Execution Rules (75) - Win an Annex match on each Flashback and Combustible Map Pack map (public matches only).

Additionally, there are six Snowblind Map Pack achievements:

Battle-Hardened Gear (50) - Reach level 50 and play a match on each of the 4 Snowblind Map Pack maps (Public only).
Frigid Body Dynamics (5) - Play a multiplayer match on each of the 4 Snowblind Map Pack maps (any mode).
Icy Dead People (25) - Complete waves 1 through 50 on any Snowblind Map Pack map in Horde (any difficulty).
Never Eat Red Snow (20) - Complete waves 1 through 10 on all Snowblind Map Pack maps in Horde (any difficulty).
The Weather Outside Is Lethal (15) - Win a multiplayer match on each of the 4 Snowblind Map Pack maps (any mode).
Veteran Gear (75) - Reach level 100 and win a match on each of the 4 Snowblind Map Pack maps (Public only).

Additionally, there are thirteen Dark Corners DLC Achievements:

Afraid of the Dark (20) - Play a multiplayer match on each of the 7 Dark Corners Map Pack maps.
Am I Only Dreaming? (40) - Reach level 40 in multiplayer and complete waves 1-40 on the Memorial map in Horde.
Be Careful What You Wish For (10) - Reach level 5 in multiplayer and complete waves 1-10 on the War Machine map in Horde.
Blood on the Sand (50) - Reach level 50 in multiplayer and complete waves 1-50 on the Nowhere map in Horde.
Did Not Go Gentle (30) - Win a multiplayer match on each of the 7 Dark Corners Map Pack maps (any mode).
Highway to Hell (25) - Complete the "Road to Ruin" deleted scene after choosing the blasting option.
Is It Hot or Is That Just You? (25) - Kill 25 Bloodmounts with a Scorcher while playing Horde on a Dark Corners Map Pack map.
Like Father, Like Gun (30) - Reach level 30 in multiplayer and complete waves 1-30 on the Allfathers Garden map in Horde.
Lost in Transition (20) - Reach level 20 in multiplayer and complete waves 1-20 on the Way Station map in Horde.
My Way or the Highway (25) - Without being detected, complete the "Road to Ruin" deleted scene after choosing the stealth option.
No, But His Face Rings a Bell (15) - Reach level 15 in multiplayer and complete waves 1-20 on the Sanctuary map in Horde.
Ride It All Night Long (10) - Reach level 10 in multiplayer and complete waves 1-10 on the Highway map in Horde.
Two for the Road (25) - Complete the "Road to Ruin" deleted scene in co-op as either Marcus or Dom.

Additionally, these are All Fronts Collection DLC Achievements:

Annex - Now With Execution Rules (75) - Win an Annex match on each Flashback and Combustible Map Pack map (public matches only).
Battle-Hardened Gear (50) - Reach level 50 and play a match on each of the 4 Snowblind Map Pack maps (Public only).
Afraid of the Dark (20) - Play a multiplayer match on each of the 7 Dark Corners Map Pack maps (any mode).
Am I Only Dreaming? (40) - Reach level 40 in multiplayer and complete waves 1: 40 on the Memorial map in Horde.
Battle-Tested Gear (30) - Earn enough multiplayer experience to reach level 25 (Public only).
Forged in the Fire (15) - Win a Wingman match on each of the 3 Combustible Map Pack maps.
Frigid Body Dynamics (5) - Play a multiplayer match on each of the 4 Snowblind Map Pack maps (any mode).
Be Careful What You Wish For (10) - Reach level 8 in multiplayer and complete waves 1: 10 on the War Machine map in Horde.
Blood on the Sand (50) - Reach level 50 in multiplayer and complete waves 1: 50 on the Nowhere map in Horde.
Bound by a Shared Past (15) - Win a Wingman match on each of the 5 Flashback Map Pack maps.
Did Not Go Gentle (30) - Win a multiplayer match on each of the 7 Dark Corners Map Pack maps (any mode).
Lost in Transition (20) - Reach level 20 in multiplayer and complete waves 1: 20 on the Way Station map in Horde.
More Mystery, Less History (15) - Win a multiplayer match on each of the 5 Flashback Map Pack maps (any mode except Wingman).
Highway to Hell (25) - Complete the "Road to Ruin" deleted scene after choosing the guns blazing option.
Icy Dead People (25) - Complete waves 1 through 50 on any Snowblind Map Pack map in Horde (any difficulty).
Is It Hot or Is That Just You? (25) - Kill 25 Bloodmounts with a Scorcher while playing Horde on a Dark Corners Map Pack map.
Like Father, Like Gun (30) - Reach level 30 in multiplayer and complete waves 1: 30 on the Allfathers Garden map in Horde.
My Way or the Highway (25) - Without being detected, complete the "Road to Ruin" deleted scene after choosing the stealth option.
Never Eat Red Snow (20) - Complete waves 1 through 10 on all Snowblind Map Pack maps in Horde (any difficulty).
No, But His Face Rings a Bell (15) - Reach level 15 in multiplayer and complete waves 1: 20 on the Sanctuary map in Horde.
Ride It All Night Long (10) - Reach level 10 in multiplayer and complete waves 1: 10 on the Highway map in Horde.
Rookie Gear (10) - Earn enough multiplayer experience to reach level 5 (Public only).
Seasoned Gear (20) - Earn enough multiplayer experience to reach level 15 (Public only).
Skeletons in your Closet (20) - Complete waves 1 through 10 on all Flashback Map Pack maps in Horde (any difficulty).
The Roof! The Roof! The Roof... (15) - Win a multiplayer match on each of the 3 Combustible Map Pack maps (any mode except Wingman).
The Weather Outside Is Lethal (15) - Win a multiplayer match on each of the 4 Snowblind Map Pack maps (any mode).
Trial by, and on, Fire (20) - Survive first 10 Horde waves on Combustible Map Pack maps as a team.
Two for the Road (25) - Complete the "Road to Ruin" deleted scene in co-op as either Marcus or Dom.
Veteran Gear (75) - Reach level 100 and win a match on each of the 4 Snowblind Map Pack maps (Public only).

Unlock Characters (Multiplayer)
Kantus - Complete Act 2 in single-player mode on any difficulty.
Skorge - Complete Act 5 in single-player mode on any difficulty.
Flame Grenadier - Complete Act 4 in single-player mode on any difficulty.
Dizzy Wallin - complete Act 1 in single-player mode on any difficulty.
Tai Kaliso - Complete Act 3 in single-player mode on any difficulty.
RAAM - Have the "A Dish Best Served Cold" achievement on your hard drive from the original Gears of War.
Anthony Carmine - Have any Act 1-related achievements unlocked on your hard drive from the original Gears of War.
Lt. Minh Young Kim - Have the "Time to Remember" achievement on your hard drive from the original Gears of War.

Unlock Golden Shotgun
Acheive the highest possible rank in online multiplayer.

Unlock Insane Difficulty
Complete the game once through on any difficulty setting previously available.

Unlock Secret Gamerpics
Clear the campaign on Insane to unlock a gamerpic of Marcus.
Complete Seriously 2.0 to unlock an additional Gamerpic of Marcus.
Earn the Friends with Benefits achievement (Complete all acts in Co-op on any difficulty) to unlock a gamerpic of Marcus and Dom.

Easter Egg: Toast
In act 4, "The Hive", chapter 5, "The Best-Laid Plans" after rejoining with Dom (or Marcus if co-op) walk all the way down the hallway where locust ammo boxes are. There is a pedestal in the center along the wall. Shoot it with a weapon and press [X].