Endings
Ending A
During Chapter 4, Use the Standard on the Harpy to injure her, then shoot her with the Loaded X-Bow to finish her off. What's left of the Standard will be left behind. Take that Pole and continue on with the game.
Once you reach the Summoning, Take the Warlock Staff from the ground and replace it with the Pole. Beleszarr's magick go wild, destroying both himself and you. Thus we end our melancholic tale as the kingdom forever celebrates in remembrance of Del's sacrifice.
Ending B
During Chapter 6, take the necessary steps to save the Imp: Use both Red Gems in the headstone, Use the Salt Sack on the body before covering it with dirt. Continue on with the game until you defeat Jair's doppelganger in Shadowgate. Take Jair's Armor back to town and Use it on Jair in the Inner Sanctum to get the Jair's Key. Move into the tower and up some stairs to Use that key to unlock Jair's Room. Open the display case in the back, place Jair's Armor on the stand, Close the case back up, toss the Empty Sack on the Staff of Ages and Take the staff. Continue on with the game.
In the Prison, Use the Lavender Gem to Open up the door to the Armory. Take the Sun Stone that appears if you properly purified the Phantom. Continue on to the Summoning. Use the Sun Stone on the Staff of Ages to create the Divine Staff. Swap the Warlock Staff for the Divine Staff, then furiously click on Talimar to defeat him.
Del is richly rewarded for his heroism, and he lives in peace for the rest of his days. The kingdom of Kal Torlin experiences a new age of prosperity.
Ending C
Play through the game until you defeat Jair's doppelganger in Shadowgate. Take Jair's Armor back to town and Use it on Jair in the Inner Sanctum to get the Jair's Key. Move into the tower and up some stairs to Use that key to unlock Jair's Room. Open the display case in the back, place Jair's Armor on the stand, Close the case back up, toss the Empty Sack on the Staff of Ages and Take the staff. Continue on with the game.
When you reach the Summoning, Take the Warlock Staff and replace it with the Staff of Ages. Beleszarr will snatch up the staff and corrupt it, dispatching Del and summoning forth an unstoppable Warlock Lord. Kal Torlin has fallen to ruin.
Ending D
Take the steps necessary in Chapter 6 to not save the Imp. This basically involves not Using the Salt Sack on the body in the Grave, although you can also just skip that room entirely. Once the Phantom has been improperly purified and the Imp hath been slain, continue on with the game.
When you return to Gwynenthell Town in order to smash the Blue Gem, take a quick detour to the Curious Cat. If the Imp did not survive, there will be a creepy skull hanging from the ceiling leaking purple fumes. Take this to get the Censer. Continue on until you reach the Prison. Use the Lavender Gem to Open up the door to the Armory, then Take the Moon Stone that appears there if the Imp is not alive. Move forward to the Reflection room, where Lakmir appears in the mirrors to yell at you. Use Educ Spritus to summon him into the room, then Use the Scythe to slay him. After the Censer is done absorbing his soul, Take the Soul Prison.
Continue on to the Summoning and Take the Warlock Staff. Use the Soul Prison on the Moon Stone, then Use the resulting Void Conduit on the Warlock Staff. Use your new Void Staff in the spot where the Warlock Staff had been.
The Phantom will take control of Del's body, and now you get to click furiously on Talimar to defeat him. The Phantom then takes Del on a whirlwind tour of Kal Torlin, leaving a trail of destruction in his wake.