Exit through the secret door in the last level of The Trench. Collect all coins in the bonus level to unlock the Sumner at the character selection screen.

Go to the Cliff level in the Mountain Kingdom. Find all switches, then go to the area with the exit. Do not step on the exit portal. Instead, head down until you see a trapdoor with a star and crossbones. Step on it and you will be transported to a room with many coins. Collect all coins to unlock the Minotaur at the character selection screen.

Go to the bonus level in the Castle Tresurary World. Collect all coins to unlock the Falconess at the character selection screen. She has the same turbo attacks as the Valkyrie.

Play through the second level of the Ice World. There is a trapdoor at a dead end on top of the pile of crates at the end. The trapdoor is found by climbing the slanted crates to the top. Then, circle around until you get a chance to go back down. From there, climb the other set of slanted crates, located before the exit, and standing atop the trapdoor. Collect all coins inside the door to unlock the Jackal at the character selection screen. He is a more powerful form of the Wizard.

Go to the first town level. Find all main switches, then go to the portal. When you reach the portal, backtrack a small distance until you reach a hill with a chest, a switch, and death. Avoid death and hit the switch. Head in the position the switch is pointing and you will reach some zombies and the trap door. Stand on the trap door and collect all coins to unlock the Tigress at the character selection screen.

Reach level 10 to receive a new weapon. Reach levels 50 and 99 for additional new weapons.

Reach level 25 to receive a familiar; Valkyrie receives an Eagle, Wizard receives a Dragon, Archer receives a Butterfly, and Warrior receives a Dragonfly. Reach level 50 for a better familiar.

Successfully complete the game to receive permanent anti-death, which allows you to steal health from death.

Turn Death into food

If you know where Death is hidden, do not open the container. Instead, use a potion nearby and you should hear Death scream. Open the chest or barrel for a fruit.

Kill Death

Death will die when it takes 100 HP or is hit with a potion.

Stop time and explore

Reach the first end Boss and have a "Stop Time" item. As you are about to die vs. the Dragon, turn on the "Stop Time" item. Make sure it is still running when you lose the life. Choose to continue, and enter any level besides a Boss level. Then, time will be stopped in all levels, monsters will not regenerate, and nothing except poisoned food will harm your character. You will also have free reign on any item, however you will gain hardly any experience points.

The Ice Axe of Untar

The Ice Axe of Untar can be found in the Treasury level of the Valkyrie's Castle. This weapon is useful in defeating the Red Dragon in the Warrior's Mountain.

The Scimitar of Rasha

The Scimitar of Rasha can be found in the Cavern level of the Warrior's Mountain. This weapon is useful in defeating the Chimera in the Valkyrie's Castle.

The Flame of Tarkana

The Flame of Tarkana can be found in the Spire level of the Skytown. This weapon is useful in defeating the Yeti in the Ice Domain.

Marker's Javelin

Marker's Javelin can be found in the Fissure level of the Ice Domain. This weapon is useful in defeating The Plague in the Skytown.