- Accidentally Correct Writing: An actual Gothic state survived till 1475, well into the Renaissance, thus making it perfectly possible to picture Goths fighting with firearms and cannons (the Gothic language also survived there until the 18th century). However, given the fact that this isn't mentioned in any of the tie-in material and other liberties taken with the Goths (like poor cavalry and German dialogue) it is likelier that the creators were not aware of it.
- Banned in China: This trope is probably the reason why the developers would never include Tibetans as a playable civilization, as it's very likely the developers want to literally avoid this trope due to how popular this game is in China.
- Beam Me Up, Scotty!: "Wololo", said by the first game's Priests, is often associated with this game's Monks as well, despite the fact that they make a "Waaaaaah..." sound. This is likely due to the inclusion of the "Wololo" sound effect as a taunt, by typing '30' in the chat.
- Executive Meddling:
- Microsoft vetoed the Janissary's tall white hat, arguing that they looked like Klansmen. So the hats were removed despite being the most distinctive part of Janissary attire. If this isn't enough of a Face Palm, bear in mind that 1) the first version of the Janissary's hat wasn't white, but changed color; and 2) such tall hats were only worn by Janissary archers in the first place (like the first concept of the Janissary, but not the one included in the game), while Janissaries armed with other weapons wore completely different hats. Furthermore, the leaked Design Doc specifically instructed the art department to make the hat look good.
- Due to the unexpected success of the game, the Expansion Pack The Conquerors was rushed, so the artists couldn't do more than a new building style and probably disregarded potential units and civilizations that would require more work.
- Like it happened with the Eastern Asian civilizations in Age of Empires, Microsoft pushed for the Koreans to be included as one of the new civilizations in The Conquerors because they believed that it would increase sales in South Korea (it didn't). The craziest part: The request was made two months before release, and Starcraft I's popularity in South Korea was cited as the reason.
- I Knew It!:
- A datamine of the HD Version after the African Kingdoms expansion in Steam have indicated another expansion that will put focus on Southeast Asian civilizations. This was proven correct when Rise of the Rajas expansion was released focusing on civilizations in Southeast Asia.
- In addition, another datamine after the Rise of the Rajas expansion had another "expansion" and when Age of Empires 2: Definitive Edition was announced, fans speculated that Age of Empires 2: Definitive Edition will be available in Steam. This was confirmed by a business representative from Microsoft that all of the Age of Empires: Definitive Editions will be available in Steam.
- Meme Acknowledgement: Several of the Achievements reference AoE community memes such as "90 kg." (related to the Trebuchets), "Castle of Doubt" (for Daut Castle), "Masterpiece" (for the Koreans), "Not The Viper!" (failing the Masterpiece), "Satan's Map" (related to Forest Nothing), and "Too Lame, Too Tame" (boar stealing).
- No Export for You: A port for Age of Kings was released on the Playstation 2...but only in Europe.
- Official Fan-Submitted Content:
- After having been released in 2012, Forgotten Empires received official expansion status in Fall 2013 for the Steam rerelease.
- The voices in the African Kingdoms campaigns have been provided by fans who have entered a contest by the developers.
- What Could Have Been: Has its own page.
Trivia / Age of Empires II