Although first introduced in The Age of Kings, Theodoric was only available in the Scenario Editor prior to the release of Age of Empires II HD: The Forgotten, where he is renamed Alaric and appears in two scenarios of the campaign with the same name: All Roads Lead to a Besieged City and Legionaries on the Horizon!. Theodoric appears again in the first scenario of the Tariq ibn Ziyad campaign in Age of Empires II HD: The African Kingdoms, where he is renamed Roderic.
- In an AMA for Age of Kings Heaven, Ensemble Studios designer Sandy Petersen stated that he would have liked a Gothic campaign based on "either Alaric or Theodoric", but without clarifying if making such campaign had ever been planned for The Age of Kings or which of the historical Gothic kings with these names he meant.
- Theodoric I (c. 390 - 451 A.D.) is mentioned as the leader of the Visigoths in the cutscenes of the fifth Attila the Hun campaign scenario, The Catalaunian Fields. However, while the Visigoths appear as an enemy faction, this unit does not.
- Other Gothic kings named Theodoric include his son, Theodoric II (c. 426 - 466), who expanded the Visigothic kingdom into Provence and Spain; and the Ostrogothic king Theodoric the Great (454 - 526), who conquered Italy and the Western Balkans and acted as a regent for the Visigoths in Spain after Alaric II was killed in the Battle of Vouillé (507). The Mausoleum of Theodoric the Great in Ravenna also serves as the Gothic civilization's Wonder.