Free Cash:
This exploits a bug in restarting a replay mission, so it may sound confusing. The idea is to capitalize on the reward you get for re-doing a mission better than you did before, earning more cash. The positive balance is always transfered into your account. Complete a level very poorly. Then, replay the level and do as well as you can. Before you complete the mission, create a save point near the end. When looking at the mission review screens, after your reward is added, press B to return to the first screen and Y to replay the mission. The game says you'll lose your progress, but you should start at the save point you created before you escaped the mission. End the mission again, and collect your reward again. Repeat.
Free Intel:
To save some cash on intel, start a mission and purchase all the available intel. Once in the mission, make a note of the information and choose to restart the mission. You'll have the money back you spent on the intel, and if you paid attention, you'll still have all the info.
Alternate Title Screen:
Beat the game to see an alternate version of the title screen.
Get Down:
In the mission 'A Murder of Crows', there are three different bars (Rock, Salsa, Blues). You can score costumes that fit in at one of the bars. So, get to any of the bars and whip out the corresponding costume, leave 47 on the dance floor for a minute, and watch him shake, shake it.
