The original Payday was pretty straightforward: Rob people, make money, level up. Payday 2 raises the ante with full-on customization and specified skill trees, putting you in charge of your criminal career.
You have a lot more incentive to snag that extra $10,000 in cash, even if you have to break open one extra safe, since the uptick in income means you'll be able to afford a sweet holographic sight for the new gun you just bought. Mount it and head over to your hideout to practice the skills you've learned.
Payday 2 is a deeper experience than the original—and because money is the key to your progress, pulling off each heist becomes a little more tense and a lot more fun.