Easter eggs are inside jokes and references to popular culture, included for the player's amusement. This is a non-exhaustive list of Easter eggs present in Imperator.
- Byzantion's province ID is 1453, a reference to the year Byzantium fell to the Ottomans historically.
- The achievement Times New Roman refers to a popular font style.
- The achievement What have the Romans ever Done for us? is a reference to a popular Monthy Python film, "Life of Brian"
- The achievement Bois Are Back in Town is a reference to the popular song "The Boys Are Back in Town" by Irish hard rock band Thin Lizzy.
- The achievement Over 9000 refers to a popular exclamation by Vegeta in the English adaptation of the anime Dragon Ball Z.
- The achievement The Romans Are Crazy refers to a popular catchphrase from the french comic series Asterix.
- The achievement Spice Must Flow refers to a popular phrase from the sci-fi novel Dune.
- The Flags of
奧西斯彌亞 and 
庫里俄索利塔 look like the Belts of Characters Asterix and Obelix, respectively, from the french comic series Asterix. - Several developer team members have cameo members ingame:
- Johan Andersson, the creative director, can be found in
斯巴達 at start as Thoukydides Priapid. - Peter 'Arheo' Nicholson, the game director, can be found in 請檢查模板名和國家代碼：
{{Countries|flag/core|Parisia (Britannia)}}at start as Arheo Nicholid 'Cantor'. Successfully befriending him or one of his children will give a special treasure. - Henrik 'Trin Tragula' Lohmander, the game designer, can be found in
群島聯盟 at start as Anaximander Lomandros 'Chartografos'. - Joachim 'Snow Crystal' Holmsen, a content designer, can be found in
刻耳索涅蘇斯 at start as Ioakeim Hommanid. - Sebastian 'Katz' Borg, an embedded QA tester, can be found in
羅馬 at start as Sebastianus Castiliani 'Cattus'. - Niels 'Gorion3' Uiterwijk, a tech lead, can be found in
弗里西亞 at start as Nilis Uiterwiekus. - Emil 'Egladil' Djupfeldt, a programmer, can be found in
凱爾特基亞 at start as Aemilius Candamius. - Evan Wu, a programmer, can be found in
象雄 at start as Weikwan Mu. - Timor Khanagov, a 2D artist/UI designer, can be found in
馬其頓 at start as Timokratos Georgus. - Joacim Carlberg, the art lead, can be found in
烙馬里基亞 at start as Jokim Carlberki.
- Johan Andersson, the creative director, can be found in