Flashback to Hell addon

A 15-level mapset for DOOM 2 that is compatible with the "-complevel 9" setting. Features new music by PRIMEVAL and James Paddock, as well as high-quality redone sound effects by Per Kristian Risvik. If the new music tracks are buggy in ZDOOM while using FMOD, updating to the latest non-official revision might fix the problem. I recommend using Fluidsynth, though. Each level of this wad has been balanced for pistol-start play. In addition, this mapset has been specially balanced to allow for co-op play, using 2-4 players. In co-operative play, the maps will be teeming with LOTS more monsters than in single-player, but ammo and health pickups will be increased as well. PrBoom-Plus users will see a new set of demos. Please do not use freelook, crouch, or jump. These features will either break the levels or will lessen the old-school feel.