Van Helsing Cheats

When you get to the part where you have to fight the three Vampires, take out the one on the left first. When the center Vampire is going to attack, she will make a screeching type of sound. When she does that, get ready to dodge her attack. When she uses her lightning attack, hide behind the pillar. When you take out the Vampire on the left, the center Vampire will transform. The transformed Vampire will land on the ground and remains still. Back away and do not get hit when she dives after you. If you follow this and attack at the correct times, you should be able to defeat them.

When you fight dracula hit L1 to get more powerful ammo and then shift to the handguns it will kill him faster (use it all times when you fight him).

To unlock various cheats, you have to complete many challenges through out the game:

Rifle:
Complete all of the Easter egg mini-games games twice.
Infinite Ammo:
Complete the game on hard difficulty
Power Clothes:
Complete the game on any difficulty with your hat on your head at all times

When battling Dracula for the first time in Castle Frankenstein, a bunch of lab equipment will be near Velken off to the side.Look for a batch of green ooz, jump in and click the action button until you find it. You may only keep it if you get it before killing Dracula otherwise you must go back for it.

Defeat the game on Hard Mode

Hint:When he spins around with something blue in his hand just take at
least three steps back or you'll get hurt. Use the Shotgun and then pull
the Left Trigger button. Then it might be a little easier, but you could
also use the crossbow, it works just not as much as the Shotgun. Once
you run out of Ammo you have to go up to him and hit him with your Tojo
Blades to get back your Ammo.