Damage numbers show how much damage you deal to everything.Extremely flexible difficulty: apart from traditional skill levels, different classes can be harder or easier to play in single player.Map completion bonuses (nicknamed 'lootboxes').Monsters from Doom, Doom II, Doom (2016), Quake, Quake II and Quake 4.11 weapons from Quake Champions, plus one.31 unique champions, each with their own active and passive abilities.Resources from the Freedoom project are utilized to make this possible. A special patch is provided taking advantage of the new features of this engine.