The Dungeons of Grimlor II is a single player, shareware, DOS dungeon game. The dungeons are labyrinthine and are full of traps to avoid, monsters to battle and puzzles to solve. Boulders can be moved to trap nasties and to block arrow shooting walls. There are some monsters which cannot be killed by Sir Merdimek's arrows, though they are vulnerable to other things, and there are wizards who can raise the dead. Sir Merdimek can ride rivers to secret rooms and use teleporters which may lead more hidden treasures.

The dragon is back and as a lich, a being that's both alive and dead, he's stronger than ever. Sir Merdimek's quest is to find the dragon and destroy the source of its power, killing it for all time. To do this Sir Merdimek must locate the keys that will open the doors to the depths of the dungeons where he will find the Cross of the Lich that is the source of the dragon's power.