"DOOM 87: The Lost World" is an upcoming vanilla-compatible DOOM II megawad.  The first few maps are fairly easy, but the difficulty increases significantly by the start of the Hell episode on MAP12.  Currently, a 21-map beta release is available and features some epic vanilla DOOMING action!  Get ready for an exciting new adventure as Doomguy locates a secret hellspawn base on Earth known as "The Lost World."   Download the "DOOM 87: The Lost World" beta release today!   D87