HD-Texture Version that requires Doom 2, and the Default Version that only requires Simons Destiny to be loaded! 1. HD-Texture Version requires Doom 2 as the Iwad and Simon's Destiny loaded as mod to work Properly just like the Original 3rilogy version. This one uses KalsHDTexture pack and Liquid Texture Pack to make Episodes Cv3 and Cv2 really pretty. Does not affect Simon's Destiny episode at all, but it is plenty pretty anyway. 2. Default Version only needs Simon's Destiny as the IWAD to work!!! All episodes work properly and the same as the original version of 3rilogy! Thank you Freedoom for making this possible!