KEEPING IT GOING
TeamTNT (originally short for "The New Technology") was a group of various Doom mappers formed in 1994, who produced various Doom megawads. Their most well-known work would be Final Doom, which was sold as an official Doom game at retail. This release was somewhat controversial in the fanbase at the time, as a community-developed megawad being sold as a commercial product was unhired of.
Releases from the group slowed down by 2008 and they later disbanded in July 2015 following the death of founder Ty Halderman.