A good construction set bundled with a good stand-alone game
The best parts about the ACS were the flexibility of the construction tools. You could build just about any game you wanted within the limits of the game engine design.
I also liked the option to create random adventures, which produced some interesting quests for my character after he finished "Rivers of Light", the bundled adventure.
More animation and better sound effects would have improved the game a lot.
Missile combat was somwhat awkward too.
The Bottom Line
A good construction set for top-down view adventure game with few limitations for its time.