You can still feed on souls in the water while swimming at the same time...

I don't know if the crows do this in any other area, but on your way to The Tomb of Serafan(The area with the three vampires, and a gate, with tunnel in front of you) there are a couple of crows, one of them has a routine flight, but did you notice it flew...backwards?

The place you get the Light Glyph, with the Mural on the wall, theres two Triforces(From the Zelda Games), one right side up and one upside down...I don't know what this is suppose to represent, theres also two others behind that on the walls when you first enter...Is Raizel close to our Hylian Hero, Link?

When Raizel uncovers his 'past' in The Tomb of Serafan, theres another tomb with Turel on it, but you do not fight Turel. Turel was one of Raizel's brothers I think, but he got cut out of Soul Reaver obviously...

If you get a weapon in your hand, and use the Restore Health code(Refer to codes to see how to enter it) the Soul Reaver doesn't appear around your arm, until you put the weapon down.

This is just a little trick I stumbled on accidently, In Zephon's Cathedral, the area with the two big block walls, that you can move my moving those two block objects by the side of, there are two 'Spider' Vampires, get by one of the Block Object that operates the Block Walls to move them, once one of the Vampires is about to jump at you and attack, hit the action button to move the Block Object that moves the Wall, if you did it right, the Vampire will have hit you out the way, but the block will still pick itself up, and turn side ways moving the Block Wall...A Glitch as we can see...(You can probably do this elsewhere with areas similar to this one)