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.
TeamTNT developed in late 1994 and early 1995 from the highly active doom-editing mailing list. TeamTNT originally formed as a two-group entity: the Alpha group whose concerns centered primarily on level design and mod work employing pre-existing Doom II resources as developed by the original Id Software team, and the Beta group who would be focused more closely on partial and total conversions including sprite changes. The Beta team dissolved shortly after the official formation of The TeamTNT Trust, the legal entity which dealt with Id Software during negotiations concerning Final Doom. As of February 1995 team membership numbered at 104 members (including all former members of the doom-editing mailing list), however during the next few years membership declined and fluctuated such that as of 1999, membership ranged from 35–40 members with as many as an additional 40 former and inactive members still listed on official member lists.
TNT website administrator Ty Halderman maintained the /idgames archives before his death from brain cancer on July 31, 2015. Paul Fleschute broke his "Ultimate Invasion" project away from TeamTNT. The project is no longer being worked on. A number of TeamTNT members are also involved with the LUC project (a game being developed by Suspension Software based on the Quake II engine).
Some work has also been done by TeamTNT on the following projects. Many have been greatly delayed or cancelled by the splitting up of the TeamTNT group, a lack of modders/coders/etc and a general lack of time/interest.