Cheat mode:
Press (Esc) and enter one of the following codes to activate:

Result - Code:

Refill health - 364141
Upgrade health to next level - 271543
Maximum health - 263434
Refill magic - 221523
Maximum magic - 5232451
Hurt Raziel - 16443
Pass through barriers - 3661254
Wall climbing - 538243
Force projectile - 126121
Swim ability - 4632614
Constrict ability - 34226443
Soul Reaver - 35822331532
Fire Reaver - 342431623
Make Fire Reaver - 52364
Aerial Reaver - 724451124
Kain Reaver - 76251124
Shift at any time - 4432216213
Force Glyph - 31534
Sound Glyph - 2236443
Stone Glyph - 3641322
Water Glyph - 36432
Fire Glyph - 4424582
Sunlight Glyph - 16122441
Toggle active cheats - 1324

Use of the Constrict ability:
First, you must have a circular area around the target. For example: Assume that the target is a Dumahim vampire (the most common in Nosgoth). Now, without using autoface, run a complete circle around the vampire until Raziel is followed by a trace of blue energy. This energy, once fully invoked, will "constrict" the vampire, causing it to be momentarily stunned -- and allowing ample time for you to finish the it off. The Constrict ability has odd effects on humans. They are as follows:

1. Certain humans, once you begin the Constrict ability, will act as though they plummeted into water. If you do not finish the ability, they will "drown".

2. The human will get stunned when Constrict is half finished, allowing you to stop and feed on their soul.

3. The most common and normal result is that the human will instantaneously die.
The Constrict ability is required to complete the puzzle in the Chrono-chamber. Also, make sure to return to areas of Nosgoth you have already visited prior to gaining that ability. You will find that Constrict can be used on many things, and may open up useful secrets (such as Eldritch artifacts, Glyphs, and life force pieces). Constrict does not work on Kain and will not work underwater.

Fight Malchia:
To defeat the Malchia, lure him under one of the two spike gates and release them right when he is slithering under it. Repeat this on the other side of the room. After that, lure him into the center cage, quickly jump out, run to where Malchia started from, and roll the lever. This will cause the large spikes on the ceiling to come grinding down on top of him.

Fight Dumah:
Pull the three stakes out of him to bring him back to life. Lure him into the furnace room very slowly -- if you move too fast, he will return to his room and you will have to begin again. Turn on the gas and hit the switch after he is in the furnace room to fry him.

Fight Zephon:
Bring a torch with you to the fight with Zephon. Run up to his belly, and swipe the torch at the hole for a bit of damage. He will attack with his leg, and get it stuck in his belly. Strike the leg. He will be heavily damaged. Strike the egg hole to cause more damage. Any time he gets a leg stuck in the ground, hit it with the torch, then hit his egg sack to quickly kill him. This is easier than the "correct" method. After defeating him, you will gain the ability to scale walls.

After the intermission sequence, run towards Zephon and get him to stab at you with his legs. When they are stuck, attack them. They will shatter and the battle will be easier. Hit him in the sack to get him to spit out an egg. Pick it up and run over to the half-man with the flamethrower. Light the egg on fire. The egg will begin to make a creaking sound. The faster the sound, the closer the egg is to exploding. Time the throw so that the egg explodes just as it hits him. Repeat this until Zephon is defeated.

Fight Rahab:
You must enter the chamber in the spectral realm. Go to the top pillar where the portal is located and materialize. After a brief exchange of words, your only task is to shoot out the windows lining the room to let in the sunlight. Use the force blast-- you do not need Soul Reaver, so do not worry about taking hits. After he dies, you will acquire the swimming ability.