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GameFly / GameFly UK has a Europa Universalis Weekend Sale going on.
Europa Universalis IV $10 (Steam)
Europa Universalis IV Digital Extreme Edition $15 (Steam)
Europa Universalis IV: Conquest of Paradise $9 (Steam)
Europa Universalis IV Pre-Order Pack $2.39 (Steam)
Europa Universalis IV: Digital Extreme Upgrade $2.69 (Steam)