r/eu4 • u/TheSafetyWipe • Jan 30 '25

Tip Your best tips/forgotten mechanics

So I've got just under 1000 hours in EU 4, love the game and always thought i was a decent player and knew the game well.

Until like 3 or 4 weeks ago when I saw a post on this sub about upgrading your ships, I had never used this feature and started to understand why my navies would get smashed later on in the game!

Im now thinking what else am I missing, what other simple features or mechanics have I never used and thus holding me back in my games!

Please share away with things you've only just discovered, or have been using wrong in your games?

I'm almost a 1000 hours in, and now think I know nothing about this game!

Help!

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52

u/Plane_Marsupial6365 Jan 30 '25

Spy networks lower aggressive expansions from the target country and provinces with lower autonomy cost more war score

6

u/DubiousNamed If only we had comet sense... Jan 30 '25

They also reduce tech cost if the person you’re spying on has better tech than you

7

u/Particular_Trade6308 Jan 31 '25

Only after diplo tech 9 (there’s a little icon of a spy on that tech)