Visit the virtual store to enhance Batmans's abilities or increase his arsenal. There are five categories to choose from, these are Character, Gadgets, Vehicles, Special, and Consumables. Some of the upgrades unlock at different levels.
A good strategy is to take out the enemies one-by-one, an effective way to accomplish this is to use the Grapnel to reach a high point and then when an enemy comes into range pick them off when the stealth icon appears.
During the game you will need lock picks to open item boxes, try not to mess up when you frantically tap the screen to connect nodes because if you fail you will lose that lock pick and they cost credits to replace.
Use Batman's Grapnel when you need to cover long distances quickly as this gadget will allow you to swing between buildings. It also comes in handy for neutralizing snipers, or simply dragging a bad guy into the Caped Crusader's clutches.
A good strategy during a fight against a gang of foes is to always take out the armed thugs first and deflect incoming attacks by pressing the counterattack icon when the virtual button appears on-screen.