In an effort to remove the variance of randomly choosing the right or wrong altar on the Astral Plane: The first high altar you step on is always a wrong one, and the second one is always right.

You can invoke the Amulet on Moloch’s high altar to destroy it; this does something good later for you (more points? prestige?) but Moloch will now harrow and hound you down all the way back through Gehennom even more fiercely than usually.

Various alternate endings for the game:

• You can take over an abandoned shop, stock it with items and mimics, and settle down as a new shopkeeper, ending the game. This creates a bones file with you replaced by a shopkeeper bearing your name.
• You can eradicate the Wizard of Yendor from the game entirely and forever, becoming the next Wizard of Yendor yourself. This is done by standing in the center of the Wizard’s Tower wearing the Amulet of Yendor and invoking it. This respawns a beefed-up Wizard; defeat him and the game ends with you as the next Wizard. (It’s missing an end condition for what happens if you escape the dungeon while in this semi-powered-up state.)
• You can claim the Amulet’s power for yourself rather than giving it to a god. While anywhere on Astral, invoke the Amulet while wearing it. You get some big and unspecified surge of power from it. Furious at your betrayal, your god smites you every way they can, joined in by the other gods and the Riders, calling to bear all their priests, angels and Archons, which spawn in swarms on the high altars. (You also lose sanctuary.) You have to reach each high altar and shut it down/destroy it. Once you have done this, you win and keep the Amulet’s power for yourself, as long as you can manage to hold on to it.
• Alternatively, there is another way to do the “claim the Amulet for yourself” way: once you invoke the Amulet, a timer starts. The gods have only this much time to kill you or take the Amulet away before you become invincible to them. Would require some anti-boulderforting measures though. Or, you have to escape the Astral Plane back to the surface wiht all the gods trying to impede your progress.
• You want to break the power of the Amulet so no one gets it, and break the gods’ dominion over the world. You must invoke the Amulet while standing on each high altar to destroy it. (Not mutually exclusive with the other ending: you don’t channel the Amulet’s power into yourself, but into the high altar. In a game with both endings, you trigger the other one by invoking it anywhere except a high altar.)

Also see the Astral Escape Patch.