On systems equipped with AMD/ATI graphics cards, Dungeon Keeper 2 only supports the software renderer, which is enabled by default. If you already turned on the Hardware Acceleration setting and cannot switch back, launch the game by using the Dungeon Keeper (Safe Mode) shortcut.

If you don't have this shortcut, download and extract this file. Afterwards use the dk2_safemode.exe file to launch Dungeon Keeper 2 in a visually tweaked software rendering mode..