Dungeon Keeper 1

In Dungeon Keeper, your underground domain is being invaded by a band of annoying Heroes, headed by the Avatar. To defeat more than twenty levels brim-full of the forces of good, you needed to recruit the dungeon's creatures and create your own evil army.

However, your army won't stay with you on love alone. You must feed and nurture them (with the occasional disciplinary slap, should they get lazy). In order to defeat the Heroes, you must train your creatures for combat; research new and more powerful spells; and create traps and other forms of reinforcement so your dungeon fortress remains yours.

But all this costs money.

This is where your loyal Imps come in. These versatile, magical creatures will dig gold from the bare rocks on your very command, and claim new ground to enlarge your presence and fortify your walls.

When you encounter your enemy, do you just kill them in the name of adventure...? Heavens, no. Throw them in your Prison to shame them, to starve them... then place them in your Torture Chamber to prise vital information from them.