Impure Offering is a single player map for the Doom 2 IWAD in -complevel 9 that plays in the map 20 slot and requires cc4-tex.wad. The original intent was to create a map inspired by map 02 of Vanguard, but with a very-high, at times slaughter-ish, monster count and fierce difficulty. I don't think it actually ended up playing anything like any map Skillsaw has ever made, but I am very happy with the result regardless. The "fierce difficulty" aspect certainly is in evidence in the final produc