Unlockable: Anthony Carmine - 01/03/09

To unlock Anthony Carmine for use in multiplayer, have any Act 1-related achievements unlocked on your hard drive from the original Gears of War.

Unlockable: Dizzy Wallin - 01/03/09

To unlock Dizzy Wallin for use in multiplayer, complete Act 1 in single-player mode on any difficulty.

Unlockable: Flame Grenadier - 01/03/09

To unlock the Flame Grenadier for use in multiplayer, complete Act 4 in single-player mode on any difficulty.

Unlockable: Insane Difficulty - 01/03/09

To unlock the Insane Difficulty level, complete the game once through on any difficulty setting previously available.

Unlockable: Kantus - 01/03/09

To unlock Kantus for use in multiplayer, complete Act 2 in single-player mode on any difficulty.

Unlockable: Lt. Minh Young Kim - 01/03/09

To unlock Lt. Minh Young Kim for use in multiplayer, have the "Time to Remember" achievement on your hard drive from the original Gears of War.

Unlockable: RAAM - 01/03/09

To unlock RAAM for use in multiplayer, have the "A Dish Best Served Cold" achievement on your hard drive from the original Gears of War.

Unlockable: Skorge - 01/03/09

to unlock Skorge for use in multiplayer, complete Act 5 in single-player mode on any difficulty.

Unlockable: Tai Kaliso - 01/03/09

To unlock Tai Kaliso for use in multiplayer, complete Act 3 in single-player mode on any difficulty.

Unlockable Gamerpic #1 - 01/03/09

Clear the campaign on Insane mode to unlock a Marcus gamerpic.

Unlockable Gamerpic #2 - 01/03/09

Earn the Friends With Benefits achievement to unlock a Marcus/Dom gamerpic.

Hint: Difficulty Trick - 01/13/09

If you want to beat the game on Insane Difficulty but are having trouble, try the following. Start each chapter on Casual Difficulty after having unlocked Insane Difficulty. Then, before reaching the final checkpoint on any given chapter, switch the difficulty over from Casual to Insane. Then, finish the chapter. The game will record that you’ve completed that particular chapter on Insane Difficulty, even though you played a vast majority of the chapter on Casual Difficulty.

Hint: Eleven Executions - 01/13/09

Apart from the 15 weapon kills (all of them are in the manual, aside from the Troika and Boomshield), the unique executions are probably the hardest things to figure out. You must have an opponent on the ground and crawling to do these executions. Luckily, you can do them on any mode (campaign, horde, multiplayer, etc.). Anyway, there they are:

• Curb Stomp -- BLUE button with any weapon.
• Punch Combo -- YELLOW button with any weapon (except the ones listed below).
• Neck Snap -- press GREEN button to take an enemy hostage, then context action to snap necks.
• Any weapon (except the ones below w/ RED fatal) -- RED button fatality
• Longshot -- YELLOW button fatality
• Longshot (alternate) -- RED button fatality.
• Boltok -- YELLOW button fatality.
• BoomShield -- YELLOW button fatality.
• Gnasher -- RED button fatality (hold while stationary over victim).
• Torque Bow -- YELLOW button fatality.
• Torque Bow (alternate) -- RED button fatality.