- Celebrity Voice Actor: Gary Oldman, who later voiced other video game characters such as Viktor Reznov, voices Spearhead's protagonist Jack Barnes.
- Dueling Games: Spearhead and Breakthrough, which were both released in 2003, competed against the first Call of Duty game, made by several members from 2015, Inc. who helped develop the base Allied Assault game.
- Recycled Soundtrack: The game uses a number of soundtracks from both the first Medal of Honor and Underground, notably during the Fort Schmerzen level. This makes sense, since Michael Giacchino composed the tracks for all these games.
- Recycled Premise: The final level definitely counts, as it's a return to Fort Schmerizen, the setting of the final level of the first Medal of Honor.
Trivia / Medal of Honor: Allied Assault