The player's task is to collect four pieces of corbum, a magical material from which the eponymous Lord Chaos draws his power. Another new, useful feature is an ingame real time map of the dungeon, which makes use of the GOR magic glyph (It had no use in the first game though it's said it was used to create FUL bomb attack potions, which wasn't kept as a spell for the released game) The original had countless guides but the much harder sequel did not, perhaps due to the game itself having an inbuilt map as well as the 'oracle' hint feature, even so though a shorter game it is a lot harder. The game is made a little easier by the inclusion of a separate program which dispenses cryptic hints based on the player's current saved game. In an indication of the game's uncompromising toughness, the player's very first task is to get out of a dark, enclosed room filled with ferociously toothed man-eating giant worms. The player can choose from a selection of moderately high-level characters or can import characters from a Dungeon Master saved game. The game is therefore pitched at a much higher difficulty level than its predecessor. The puzzles are far more convoluted, often demanding quick mastery of the control system to deal with intense combat, along with brain vexing riddles and room layouts.

Whereas the first game saw the player following a fairly linear path through the adventure, with the completion of each flat level marked by a staircase leading down onto a new slightly harder level below, Chaos Strikes Back features a choice of paths which twist back and forth over all levels.

Although Chaos Strikes Back describes itself as an expansion pack, the original Dungeon Master is not required.

Chaos heroes online wikipedia