Unlockable: Extra Costumes
Complete the level 3 bets at the PMC Villa with your allies. These unlock extra costumes for your mercenary. For the best results, bet the maximum amount of money for the first two levels of challenge (manually save and reload your game to insure you win). For the third level of challenge, bet the minimum amount of money — you will need to be perfect to beat a challenge at level 3.
Note: you can also have a second player (online only) to assist you in unlocking the final challenges. In such a case, both players should receive the costume (remember to save if auto-save is turned off!)
Hint: 100% Completion
When shooting for 100% in all tasks, make sure to complete all outpost missions before you initiate the final story mission (Battle for Caracas / A.N. or China). Once the game is cleared, you cannot initiate outpost missions anymore (which unlocks a faction’s shop items).
Hint: Easy Cash
After unlocking the Winching Challenge at your PMC, you can undertake the challenge over and over again to earn endless streams of cash. When you get to the third level, start wagering the maximum amount of cash you’re able to. Each time, you’ll wager the maximum, thereby allowing you to bet even higher the next time around. This increase your potential earnings exponentially.
The challenge never changes, so mastering it is easy enough. The maximum wager is $5,000,000. In 8-12 minutes (or less, if your hand is extra steady), earning $30,000,000+ is totally reasonable. This is definitely one of the easier challenges to earn easy, massive amounts of money on. Give it a go!