Mercenaries 2: World in Flames

Win the level 3 weapon challenge bets at the PMC Villa with your allies to unlock a random alternate costume. Talk to Fiona at your PMC to access the challenges (Gun Emplacements, Pistol, Grenade Launcher, and Sniper). Each character has a total of five costumes. Note: Bet the maximum money for the level 1 and 2 challenges then save and reload the game until you win. Bet the minimum money for the level 3 challenge.

When you get the maximum betting level on the Winch challenge, keep going until you get to about $100.0 million. The minimum bet is now also $5 million. If you continue from that, the minimum will actually grow higher than the maximum and allow for even more money. However there is a catch; once you go beyond there is no way you can raise or lower the bet because it is higher than the maximum, but it is still the minimum.

Unlock the P.L.A.V. faction and get a gunship with rockets, such as a Castro V Attack chopper or an Anaconda from the pirates (recommended, as it carries about 80 rockets). Fly to the city of Merida and shoot the billboards. You will earn $5,000. If you shoot enough of them you begin to unlock more shop items from the P.L.A.V. and a few things from the U.P. mercenaries in their city. Only one rocket is required to destroy a billboard. It only takes 1 rocket from a gunship to destroy those pesky billboards.

When playing in Co-op mode with a friend, look in the same direction at the same time. Throw the signal smoke to call in for reinforcements to capture an outpost. If done correctly, both of the thrown signal smokes will start to smoke and two helicopters will appear. This will speed up the process when you are getting shot or are in a tight situation.

Press select to open the PDA, then enter the Cheat mode code. Close the PDA and re-open it. Use the D-pad to enter the codes while the PDA is open. Note: These cheats require the October 26th update from PSN to work.