To unlock cheats, look for small, glowing, white orbs (eggs) hidden throughout Transylvania. Stand on one and press Circle. A message should appear at the bottom of the screen with more information about what was unlocked.
Armory Anytime
Find the large gear room in the Castle Frankenstein's basement. Stand on the wooden platform on the right side of the room, then use the grappling hook to reach it. Alternately jump on the stallions while fighting Demon Verona on the stagecoach. Get knocked off the stallions by of the brides. An intermission that shows Van Helsing getting dragged under the coach will appear. Repeatedly tap Circle while under the coach to collect the cheat icon. Alternately, first complete the game and get the Gatlin Gun upgrade. When you get into the gear room, instead of going into the door, power it up and go to the other side. Use your grappling hook and it will take you to a stone door. Use your Gatlin Gun upgrade to start a intermission sequence and it will be Armory Anytime.
Big Head
In mission two, look near the Ghost Body cheat icon to find the Big Head cheat icon near a wagon.
Fell Skin
Complete mission five, then get egg in the well. Defeat the werewolf in the town, and put the egg on a pedestal to get the cheat icon.
Ghost Body
In mission two, look behind the 'dragon' door at the start of the train station to find the cheat icon. Use the alternate Tojo blades to collect it.
Power Clothes
Successfully complete the game wearing your hat on every mission.
Rifle
To get the Rifle, win all of the Easter Egg mini-games twice.
Small Fiend
In mission six, enter the side entrance to the castle. After defeating the werewolves, walk to the lion gargoyle that is pouring water and press Circle. The cheat icon is in its mouth.
Translucent Body
In mission two, get past the train station area and look behind the 'dragon' door.
Unlimited Ammunition
Successfully complete the game under the hard difficulty setting.
Unlimited Speed
Just after entering the side courtyard of Castle Frankenstein, turn left (in the direction of the tower). Double jump around until you can see the cheat icon. Use the grappling hook to reach it.
Mission One Cheat Icon
When you first can use the grapple, you will see something white glowing. It is the cheat icon. After using your grapple, jump and get it.
Completion Bonus
Once you have completed the game and wait for the credits to roll, you will be prompted to save your game on a new game option. Do so and you can start the game with all previously unlocked cheats, power-ups, and items.
Defeating Enemies
When a Boss or other strong enemy grabs you, keep pressing L1 (Shoot) to take away great amounts of life away from them.
Defeating Vampires
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.
Alternate Lightning Gun
When escaping Castle Frankenstein on level 8, you will pass through familiar rooms. When you get to the room where you first encountered pygmy bats, jump through the hole in the wall in which you came through to get up there. As you jump down, you will notice a pool of spilled goo off to the side from one of the containers. If you look closely, a glowing lightning gun will be lying in it. Add it to your growing collection of superb weaponry.
Alternate Gatling Gun
When starting out on Mission 12, you will notice a bunch of staircase platforms. Then wraiths will swarm at you from every corner. Slay all the wraiths and make your way to the middle stair platform to the barred door to your left. Charge up the Alternate Lightning Gun and juice the power stone in the wall. Walk inside and recover the Alternate Gatling Gun. If you don't have the Rifle, this will do for BIG DAMAGE.
Archaic Clothes
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.
Cheat Glyph: Big Melee
After getting the crossbow on mission 3 jump onto the ledge that it was on then walk to the end of the ledge and walk into the square hole. Press circle and you will get the cheat glyph for big melee. Now your melee weapons are super sized and ready to kick some monster butt.
Two extra life replenishers
On mission 6 or Return To Frankenstein's Castle there are to life replenishers, to get the first one after entering the castle's broken gates kill all the werewolves and then stand in the centre of the area. Then hold R1 and walk aroung near the centre, if you are in the right position your icon should glow red if it does then press circle. You won't go anywhere but a life replenisher will drop down. To get the secong one you have to stand right next to the egg pedistal in the same area, keep walking around while holding R1 until the grapple icon glows red, when it does shoot the hook and you will go up onto a thin ledge. Walk along the edge until you reach a wooden door, shoot it with the shotgun and there will be a life replenisher in it.
Gargoyle Skin
In mission two, put the egg on the pedestal. Then, successfully complete the Maze challenge.
Metal Body
During mission ten, you must knock over a large statue to create a bridge. At the base of that statue, use the Alternate Crossbow to break open a "dragon" door to find the cheat icon.
Wraith Skin
In mission eleven, put the egg on the pedestal. Then, successfully complete the Rising Blood challenge.
Translucent Fiend
Successfully complete the game, then play mission two. Shoot the Alternate Crossbow at a statue found on top of a small cliff to reveal the cheat icon.
Sick Player
Enter the second cave in mission 6. Use your shotgun to break open the "dragon" door to access the cheat icon.
Shadow Fiend
Jump on the stallions while fighting Aleera and Verona on the stagecoach. Get knocked off the stallions by of the brides. An intermission that shows Van Helsing getting dragged under the coach will appear. Repeatedly tap Circle while under the
coach to collect the cheat icon.
Shadow Body
In mission eleven, get to the top of the icy cliffs and go inside the cathedral. Use the Alternate Shotgun to shoot the wall to the right of the door to reveal the cheat icon.
Plain World
In mission 3, get to the top of the waterfall. Jump on the single pillar, then grapple over to the ledge with the cheat icon.
Metal Fiend
In mission seven, proceed to the part where you must climb the waterfall. While climbing, you will find a rock that can be grappled. The cheat icon is located just above that rock. Continue climbing to the top of the waterfall, position yourself directly above that rock, then drop on to it to collect the cheat icon when falling.
Color body
In mission three, look behind the crates on the right side of the corridor that runs between the graveyard and the library.
Dwerger Skin
In mission five, put the egg on the pedestal. Then, successfully complete the Destroy The Statues challenge.