Army of Two: The 40th Day 2010

Trophy Hints

Hate Monger, Scavenger: Both these achievements require some weapon customization and unlocked parts to get. Hate Monger requires upgrading a weapon to have a very high aggro rating; it doesn't require it to be %100 full, but nearly. The style upgrades such as jigsaw and pimp will add a lot of aggro. Scavenger requires the purchase and addition of any 3 homebrew upgrades to your weapon. Items like the Rusty Stock, Metal Plate, and Soda Can Silencer are perfect for this.
Pumpkin Patch: Getting two headshots with a single bullet can be a tough challenge, unless the targets aren't moving. At the start of chapter 3 you can take the General hostage at which point the three other soldiers will surrender. At this point just line up a double headshot on two surrendered soldiers for the achievement/trophy.
Rock, Paper, Scissors: This achievement/trophy just requires you to win 3 games of rock paper scissors in a row. Press Y while not in combat next to your partner to play rock paper scissor and use the d-pad to pick rock,paper, or scissors. This is easily done with another player as you can just have them let you win 3 times in a row.
Grenadier: The easiest way to do this is to go to campaign mode and start up Chapter 5, A Trip to the Mall. At the very beginning of the stage is a hostage situation where 3 enemies gather around a civilian. Put your morality aside and chuck a grenade at the civilian and it should kill him and all 3 enemies, netting you the achievement/trophy.

Unlock weapons and items from the original Army of Two

When you first start the game it will check your system for data from the first Army of Two. You get additional weapons and items to use when you reach the trash container at the start of chapter 1.

 

Cheat Codes

After beating the game for the first time, the Big Head Mode and Infinite Ammo cheat codes become available in the options menu (cheats may prevent you from earning trophies).

 

Fully upgrade weapons at the start

Upgrade your weapons/buy new ones at the start of the game, then play until the cutscene with the moral choice and make it. Go back to the main menu during the cutscene with the explosions, select campaign,  and select the one you just did. Click new, and you will have all the weapons, upgrades and money from the previous mission, and can upgrade your weapons again. Repeat until all your weapons are upgraded/bought.

Extra Outfits

After beating the game for the first time, several outfits will be made available. You can change your outfit at the character select screen.

Unlockable	How to Unlock
Beat-up (end game armor)	Complete game once
Civilian clothes (no armor)	Complete game once
Light armor	Complete game once
Mall clothes (bare armor)	Complete game once
Medium armor	Complete game once
Old school armor (original Army of Two armor)	Complete game once

Achievements

Unlockable	How to Unlock
A Decent Animal (15)	You need to complete Chapter 3 on Any Difficulty Level
A Steep Descent (10)	You need to complete Chapter 2 on Any Difficulty Level
Attention Grabber (10)	You need to allow your partner to snipe 5 guys while in Mock Surrender
Chaaaaarge! (15)	You need to charge through 20 enemies
Co-Op Sniper (10)	You need to Co-Op Snipe 5 enemies
Emergency Room (20)	You need to complete Chapter 4 on Any Difficulty Level
Full Arsenal (30)	You need to collect All Weapons and Weapon Parts
Gone Shopping (25)	You need to complete Chapter 5 on Any Difficulty Level
Grenadier (10)	You need to kill 3 or more enemies with a single grenade
Hardcore (100)	You need to complete the Game on Contractor Difficulty
Hate Monger (10)	You need to customize a weapon to high aggro
Healer (10)	You need to heal your partner 10 times
Humanist (30)	You need to save every hostage
In Synch (10)	You need to kill two enemies with simultaneous Quick Draws while in Co-op Mock Surrender
Loot and Pillage (20)	You need to collect $1,000,000
Meat Bag (15)	You need to use 15 enemies as human shields
Not So Bad After All (10)	You need to tie up 15 enemy combatants instead of executing them
Not What I Thought It Was (5)	You need to complete Chapter 1 on Any Difficulty Level
Old Faithful (20)	You need to kill 400 enemies with assault rifles, sub machinguns or shotguns
One Shot, One Kill (20)	You need to kill 100 enemies with a sniper rifle
Open Hand Slap! (15)	You need to kill 50 enemies with a melee or bayonet
Pistolier (20)	You need to kill 150 enemies with a pistol
Pumpkin Patch (10)	You need to shoot 2 enemies in the head with a single bullet
Quick Draw (15)	You need to kill 25 enemies with a quick draw from mock surrender
Softcore (50)	You need to complete Half the Game on Contractor Difficulty
Survivor? (30)	You need to complete the Game on Any Difficulty Level
The Beast (50)	You need to kill 6,666 people in Campaign
The Optimist (5)	You need to make a positive coop morality choice
The Pessimist (5)	You need to make a negative coop morality choice
The Truth Is Right Here (20)	You need to listen to all of the Radio Broadcasts
Total Fistbump Deflation (10)	You need to finish the game in a fractured friendship
Total FistBump Destruction (10)	You need to finish the game as best friends
Touch Not a Cat but a Glove (50)	You need to shoot all Maneki Neko cats in the game
Unbreakable (25)	You must survive an entire level in one session without being downed on normal difficulty or above

Cheats

Successfully complete the game to unlock the "Big Heads" and "Infinite Ammo" cheats in the "Options" menu.

Prequel bonus

Have a saved game file from the original Army Of Two to unlock the AS-KRI and S0-Z Grand Pinger for purchase.

Bonus costumes

Successfully complete the game to unlock the Civilian, End, Light Armor, Mall, Medium Armor, and Old School costumes.

Start with fully upgraded weapons

Start a new game. Use the starting money to upgrade your weapons or buy new ones. Play the game until reaching the cutscene with the moral choice. Select the moral choice, then go to the main menu during the cutscene with the explosions. Select Campaign mode, and choose the one that was just played. Select "New", and you will have all the previously bought weapons, upgrades, and money from the previous mission. However, you can upgrade your weapons again. Repeat this process to fully upgrade and purchase all the starting weapons.

New areas

When entering a new area, take your time to explore it. There may be civilians around that you should protect or alternate paths that you and your partner can exploit.

Easy "Grenadier" achievement

At the first "Civilian" hostage spot in Chapter 1, tie down the three enemies, then throw a grenade in the middle of them to get the "Grenadier" achievement. Note: You will also kill the civilians with the grenade. Thus, restart from the checkpoint after getting the achievement.

Easy "Hate Monger" achievement

Upgrade a weapon until it has nearly a 100% aggro rating to get the "Hate Monger" achievement. Note: Style upgrades such as Jigsaw and Pimp will add a lot of aggro.

Easy "Pumpkin Patch" achievement

At the first "Civilian" hostage spot in Chapter 1, have your partner tie down the first enemy. The other two enemies will get on their knees, allowing you to shoot them both in the head with one bullet to get the "Pumpkin Patch" achievement. Note: Restart from the checkpoint after getting the achievement if desired.

Easy "Rock, Paper, Scissors" achievement

Press Y while not in combat and next to your partner to play rock, paper, scissors. Use the D-pad to select rock, paper, or scissors. Win three times in a row to get the "Rock, Paper, Scissors" achievement.

Achievements

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Not What I Thought It Was (5 points): You need to complete Chapter 1 on Any Difficulty Level.
A Steep Descent (10 points): You need to complete Chapter 2 on Any Difficulty Level.
A Decent Animal (15 points): You need to complete Chapter 3 on Any Difficulty Level.
Emergency Room (20 points): You need to complete Chapter 4 on Any Difficulty Level.
Gone Shopping (25 points): You need to complete Chapter 5 on Any Difficulty Level.
Survivor? (30 points): You need to complete the Game on Any Difficulty Level.
Softcore (50 points): You need to complete Half the Game on Contractor Difficulty.
Hardcore (100 points): You need to complete the Game on Contractor Difficulty.
Meat Bag (15 points): You need to use 15 enemies as human shields.
Chaaaaarge! (15 points): You need to charge through 20 enemies.
The Beast (50 points): You need to kill 6,666 people in Campaign.
Grenadier (10 points): You need to kill 3 or more enemies with a single grenade.
Pistolier (20 points): You need to kill 150 enemies with a pistol.
Old Faithful (20 points): You need to kill 400 enemies with assault rifles, sub machineguns or shotguns.
One Shot, One Kill (20 points): You need to kill 100 enemies with a sniper rifle.
Quick Draw (15 points): You need to kill 25 enemies with a quick draw from mock surrender.
Open Hand Slap! (15 points): You need to kill 50 enemies with a melee or bayonet.
Unbreakable (25 points): You must survive an entire level in one session without being downed on normal difficulty or above.
Not So Bad After All (10 points): You need to tie up 15 enemy combatants instead of executing them.
Healer (10 points): You need to heal your partner 10 times.
Co-Op Sniper (10 points): You need to Co-Op Snipe 5 enemies.
Attention Grabber (10 points): You need to allow your partner to snipe 5 guys while in Mock Surrender.
In Synch (10 points): You need to kill two enemies with simultaneous Quick Draws while in Co-op Mock Surrender.
Pumpkin Patch (10 points): You need to shoot 2 enemies in the head with a single bullet.
Total FistBump Destruction (10 points): You need to finish the game as best friends.
Total Fistbump Deflation (10 points): You need to finish the game in a fractured friendship.
The Truth Is Right Here (20 points): You need to listen to all of the Radio Broadcasts.
Loot and Pillage (20 points): You need to collect $1,000,000.
Full Arsenal (30 points): You need to collect All Weapons and Weapon Parts.
Touch Not a Cat but a Glove (50 points): You need to shoot all Maneki Neko cats in the game.
Hate Monger (10 points): You need to customize a weapon to high aggro.
The Optimist (5 points): You need to make a positive coop morality choice.
The Pessimist (5 points): You need to make a negative coop morality choice.
Humanist (30 points): You need to save every hostage.

Additionally, there are sixteen secret achievements:

Rock, Paper, Scissors (5 points): Beat your partner at rock, paper, scissors three times in a row.
Fancy Meeting You Here (5 points): Versus: Invite a friend before joining a lobby to play a public match.
Job Seeker (10 points): Versus: In public matches, kill a player with the primary or secondary weapon from every weapon kit.
DIY PMC (10 points): Versus: Create a custom facemask online (www.armyoftwo.com) and wear it in a public match.
Death Dealer (10 points): Versus: Kill 10 players with headshots on a single map in a public match.
Power Couple (15 points): Versus: Earn the highest partnership score in a Co-op Deathmatch, Control or Warzone public match.
Future Visions (30 points): Unlock all Potential Futures.
All Guns Blazing (30 points): Versus: Kill a player with every weapon, including special weapons, in public matches.
Bound For Life (30 points): Versus: In a public match, survive an Extraction map without suffering a single death on your team.
Survival of the Fittest (50 points): Versus: Complete all 16 rounds of an Extraction game in a public match.
Big Game Hunting (5 points): Versus: Kill both members of a single partnership during a public match.
Fresh Meat (5 points): Versus: Revive your partner and perform a partner reload during the same public match.
Scavenger (15 points): Build a gun using 3 homebrew parts.
Heartless (20 points): Make only negative choices.
Purist (20 points): Make only positive choices.
King of the Hill (30 points): Versus: Win a public match on every map in Co-op Deathmatch, Control and Warzone.

The following achievements require the "Chapters Of Deceit" bonus downloadable content:

Men of the people (25 points): Escort all hostages to safety.
Pick a new face (15 points): There are some bad ass masks lying around the city. Find one or two to change your look.
Hit & Miss (50 points): Complete Chapter 8 on any difficulty level.
Train wrecked (50 points): Complete Chapter 9 on any difficulty level.
Paging Dr Wu (35 points): Dr. Wu is digging up some intel for you. Make sure he stays alive long enough to find it.
Good Guys (25 points): Meilin Jun betrayed the civilian resistance but if it's of no consequence to you, let her live.
Good fellas (25 points): Meilin Jun is a snitch and a traitor. Give her what she deserves.
Can it really be that simple? (25 points): You've got a chance to take out Jonah, the leader of the FDI. Don't blow it.