With just a little bit of time spent on the game, you’ll realize that skill points are hard to come by and expensive to purchase, with both in-game and real money. So, be smart about what you upgrade. If you have purchased an assault rifle as recommended, you should upgrade assault rifle skills first. Otherwise, focus on damage and the rate of fire of the handgun class, and don’t worry about all those other categories until you are much farther along in the game.
