Unrelenting Evil E1M1 is the 1st of a 4 map campaign. The easiest and quickest as well. The map features a skill level option at the start, and has a fantastic checkpoint system in place that resets the map up to that check point. You're not respawning into demon waves, in other words. You're basically starting over from the checkpoint. The map features a unique blend of modern textures, mixed with small amounts of classic DOOM textures that add the perfect touch to make these maps feel like classic DOOM, but with an updated look.