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Ty Halderman (1945-2015) was the maintainer of the idgames archive. In addition, he was the leader and webmaster of TeamTNT. One of his key activities was serving as one of the three principal programmers of the Boom source port alongside Jim Flynn and Lee Killough. He also designed numerous levels for various TeamTNT projects. Ty Halderman passed away on July 31, 2015 according to The Green Herring on a thread at the Doomworld forums.  He was 69 years old.
- Final Doom's TNT: Evilution
- Icarus: Alien Vanguard (Doomworld/idgames)
- Bloodlands (Doomworld/idgames)
- Grievance (Doomworld/idgames)
- Eternal Doom (Doomworld/idgames)
- Reclamation (Doomworld/idgames)
- Pax (Doomworld/idgames)
- Induction (Doomworld/idgames)
- The Return (Doomworld/idgames)