EU4 can refer to the following:

  • Europa Universalis IV: a computer game by Paradox Interactive.
  • Haplogroup E1b1b (Y-DNA) in human genetics, previously known as EU4.
  • Big Four (Western Europe), four major European powers, also known as EU4.

EU4 Paradox’s head of comms commits to overhauling forum moderation

Steam Community Guide How to create 3D units models for EU4[OUTDATED]

EU4 Development Diary 28th of May 2015 Paradox Interactive Forums

Losing my sanity as Germany in EU4, a game I have NEVER played before

EU4 Development Diary 18th February 2016 Paradox Interactive Forums