Four Against Darkness is a solitaire dungeon-delving game.
No miniatures are needed. All you need is the book, a pencil, two six sided dice, and grid paper.
You choose four character types from the classic classes (warrior, wizard, rogue, halfling, dwarf, barbarian, cleric, elf), equip them, and start adventuring in dungeons created by dice rolls and by your choices. When you enter a room, you generate its content on a series of random tables.