- “Bringing Down the House”: Tarsen is posing as a surveyor of a Romulan diplomatic delegation on Qo'noS, but was in fact paid by the House of Torg to strike against the House of Martok. He plants an explosive near Lady Sirella's mansion, but is stopped by Alexander Rozhenko and the player. However, he manages to escape to Forcas III where he kills Sirella's grandson, M'ven, in combat before being killed himself by the player.
- Kai Vilhelmsen also voiced D'Tan.
Romulan Star Empire (25th century)
|Details||Romulan Star Empire (25th century) • Romulan • Reman • Hirogen • Rator III • Gasko Station • Tal Shiar • Romulan History|
|Ground Forces||Romulan Analyst • Technician • Recruit (Romulan) • Uhlan • Sublieutenant Medic • Centurion • Centurion Engineer • Centurion Medic • Centurion Scientist • Subcommander • Subcommander Engineer • Subcommander Scientist • Commander • Romulan Captain|
|Starships||Romulan Shuttle • Scorpion Fighter • T'varo Light Warbird • Mogai Heavy Warbird • D'deridex Battlecruiser • Scimitar Dreadnought|
|NPCs||Arranhu • Charva • Hakeev • Janek • Khaiel N'Vek • Khiana • Ruul • Sela • Taris • Tarsen|
|NPC starships||I.R.W. Aethra • I.R.W. Areinnye • I.R.W. Esemar • I.R.W. Falcata • I.R.W. Khnial • I.R.W. Leahval • I.R.W. Rea • Sela's Armed Freighter • I.R.W. Sithesh|