
Other changes from the original include new power-ups: an ammo box (taken from Spear of Destiny) and backpack that increases the maximum amount of ammo that can be carried. The end bosses for the missions are taken from both Wolfenstein 3D and its prequel, Spear of Destiny. Each of those 30 levels (grouped into six missions, with two levels being secret ones) is a simplified version of an original level. While the basic gameplay of exploring levels, shooting enemies, collecting treasures, keys and power-ups remain the same, only half of the original game's 60 levels have been retained. This adaptation of the first-person shooter Wolfenstein 3D is not a straight port, but a remix with substantial changes as well as new additions.
