In Dead Rising 2 for the PS3, PC, and Xbox 360, one of the best ways to make money is through gambling. The best way to gamble though is to first collect all three of the gambling magazines. Each gambling magazine increases the payout of regular slot machines, and increases your odds of winning on the giant heart slot machine in Slot Ranch Casino.
Once you’ve collected the gambling magazines, grab a decent combo weapon or two and head over to Slot Ranch Casino and save your game. Next you’ll want to try to clear the area by the big heart slot machine on the left wall toward the north eastern exit, because the winning sounds will draw the zombies to you while you’re playing.
If you don’t have much money to start out with, go up to each regular slot machine that has a pile of cash in front of it and bet five times in a row for five guaranteed wins, which will dump out around $1500 to several thousand per pull with all three magazines.
Once you have a bit of cushion, start betting on the heart slot machine hitting the $1000 bet button on the right. With the magazines you’re carrying, you’ll start hitting 25k, 50k, and 100k quite a bit. Sometimes you can hit 100k every few minutes. Using this method I went from 100k to 1.8 million within about 30 minutes of playing. You’ll hit some dry spells for a while, so just keep grinding this machine until you have however much money you desire.