What is "teamtnt"

TeamTNT is a group of mappers who created the TNT: Evilution episode of Final Doom, as well as several free level packs and developer resources for Doom II. TeamTNT is responsible for development of the BOOM and Boom-DM Engines used by many level designers during the height of Doom wad-making in the 90s before the rise to predominance of the ZDoom engine which features BOOM support. The advantages that the BOOM Engine gave designers over the Doom engine mainly concerned the removal of dimension limits and other limits from the level specifications and physics of the game.