The modding community of Civilisation V pumps out some of the most creative stuff day by day on Steam, and luckily you don't have to be an expert in 3D modelling to participate. Besides total conversions, graphics and interface tweaks, there are quite a few funny and unexpected addons that are worth a look.
Let's check out the silliest ones below:
Eggman Empire Civilisation (by Dr Costa)
This mod adds Dr. Eggman from the Sonic games to the game, as well as unique buildings and tech, including the Death Egg Robot. Just to be faithful to Sonic.
Gabenism (by The Neckbeard Knight)
Picking a religion for our civ won't be an issue after adding Gaben.
The Candy Kingdom (by The Man with the Eyebrows)
Adventure Time, Princess Bubblegum, Banana Guards... Dropping nukes might seem a bit too strange, but it's a fun mod to pursue a science victory with.
Bold and Brash (by Karatekid1717)
Unfortunately, there's no Great Merchant Mr. Krabs mod yet, but Great Artist Squidward Tentacles will fulfil all our Spongebob needs in Civilisation V. I guess.
Seinfeld - The Kramer and The Timeless Art of Seduction (by Vice Virtuoso)
This one's my favourite. The mod adds two timeless art pieces to the game as the culmination of human history: Kramer and George Costanza from Seinfeld.