Super Dune II Classic is an updated version of the Dune II modification/add-on, Super Dune 2, which was released back in 1994 by Power C and Shadow Knight. The Classic edition fixes as many glitches and bugs in Super Dune 2 as possible, while keeping the original feel and all features of the modification intact.
The enemy army continues to wreak havoc in the player's base, and there's little to be done now that critical installations and defences are incapacitated.