View credits:
Successfully complete the game to unlock the "Credits" option.

Level select:
Successfully complete the game twice on the same save file to unlock the "Jump To Game" option.

Invincibility:
Successfully complete the game three times on the same save file to unlock the "Eternal Mode" option in the "Jump To Game" menu.

Alternate ending:
Successfully complete the game three times on the same save file, choosing a new story path each time.

Skeleton screen:
At the main menu screen "New Game", "Load Game", and "Options", select "Options" and the picture of Alex will turn into a skeleton.

Hint: Recovery:
When you learn the recover spell, use Chattur'gha (Red) to recover your health, Xel'lotath (Green) to recover your sanity, or Ulyaoth (Blue) To recover your magic.

Hint: Defeat the Black Guardian:
Stay as far back as you can, and you may want to assign Magikal Attack Level 1 and Level 3 as quick spells. Start by dodging its long ranged attacks, then you will notice a pause. Run about halfway up to it, then start the Level 1 Magik Attack. The hit will only connect if the Black Guardian is glowing. Do this three times and it will draw you closer by moving the barrier. It is however still far enough to stay out of range of its short attacks. It will summon three Zombies and then recharge. As soon as your sanity drops for the first time, begin the Level 3 Magik Attack. It should connect just in time. Do this three times and it will draw you still closer. This one is difficult because you have to keep running. Dodge his attacks six times, and he will become winded and have to recharge. Use this time to let loose a Level 1 Magik Attack. Do this three times and he should be down for the count. Retrieve the essence, and you are done.

Hint: Defeating the Guardians:
To defeat the Guardians, first make sure that all of the enemies in the room are gone (not including the ones it will summon). Then, enchant a projectile weapon with the Strong Alignment, and blast away. It will not attack you directly; it can only use magic. Watch out -- each time it takes a hit, it will teleport to another location. After a couple shots (depending on how strong the enchantment spell was) it should go down.

Hint: Defeating Skeletons:
When you are surrounded by a lot of Skeletons, just attack them one by one. Do not worry about the ones attacking you -- dodge them and run away. If you attack wildly, your character will get tired. Only attack the closest enemy, but aim for the head so they cannot see you. Then, run past it, repeat and go for the kills.

Hint: Defeating Zombies:
If you have a torch and you are face a large group of Zombies, swing the torch at them. They will die in one hit. You will have to do a final blow quickly because they will disappear if you are too slow. Note: This will only work on the normal (Mantorok) and green (Xel-ototh) Zombies.

Hint: Invisibility:
Use the Reveal Invisible spell with the Mantorok Rune to make your character invisible.

Hint: Dr. Edward Roivas' Chapter: Defeating the vampire creature:
Stop its attack on the servant in the upstairs bedroom (the one on the right). Attack it until it retreats and you see an intermission sequence of it "refueling". Talk to the servant and he will give you the Gun Cabinet Key. Take it to the other bedroom and unlock the gun cabinet, liberating the Elephant Gun. Track down the vampire creature two more times and it will drop the top half of the Basement Key. Mix the two halves and enchant the broken key to fix it. Then, enchant the Elephant Gun with the Strong Alignment and go to the basement. The first thing you should do is shoot the relic in the corner with the Elephant Gun (double barreled). Go back upstairs to reload so it cannot get you. Once the relic breaks you can attack the creature. 

Hint: Dr. Edward Roivas' Chapter: See vampire creature always:
You can see the vampire creature all the time if you cast Reveal Invisible. You can now fight him without worrying about when or where he is going to hit you.

Hint: Dr. Lindsay's chapter: Mantorok Rune:
When playing as Dr. Lindsay, find the two Runes for Summon and Creature. One is found in a zombie on the staircase down on the last floor and another is on the last floor in some cobwebs. Use your archeological brush to uncover it. Combine these two runes together to make the Summon Trapper spell. Go back up to the floor with the gold statue and find your way to the machinery that was uncovered when you dispelled all the magick fields. When you examine it, you will learn that there is a hole small enough for a small dog to walk through. Summon a Trapper to walk through the hole. Inside will be a bridge with two Horrors on each side. Walk past them and onto a switch with a purple Rune on it. Press A to kill the Trapper and take control of Lindsey again. The switch will have opened a door behind you, where the Mantorok Rune is located.

Hint: Dr. Lindsay's chapter: Defeating Winged Guardians:
The Winged Guardians that first appear in Dr. Lindsay's chapter only spawn new creatures when they hit you. Attack them when they open their wings, then run back before they strike. You can also run behind them and hit their backs without them opening their wings. This works very well when you make yourself invisible, since they will not open their wings when you are in that state.

Hint: Ellia's chapter: Shortcut:
At the beginning of Ellia's chapter, instead of going straight and examining the statue, immediately go into the right door. Going through that section of the temple first eliminates half of the trouble. Afterwards, continue as normal.

Hint: Conserving health:
When you encounter multiple enemies, do not go for the kill if there are enemies near you. They will attack freely -- avoid them.