ZDoom only modification which includes 4 episodes, new weapons, enemies, bosses and more.
It was not released for an eternity. Now you have 5 maps in episode 4, remastered E1M1 and ability to play as Metal Sonic and Eggman. P.S. Episodes 2-4 problem fixed: Select your original Doom.wad as IWAD and TNT_Sonicbeta.wad as PWAD and every episode will be selectable.
Fun, but dont go vs bots all they are are just egg men and metal sonics it gets un fair ;-;