My Game doesn't start - Solution

[Łukasz Jakowski Games]

The game can now only be run as a game.jar - Java file.

Just run the game without the need to install Java when launching the game via Steam

Or

if you launch the game and a zip file or WinRAR opens instead or something else, then:
Go to the game files:
Right-click on game.jar → Open with → Java (or Choose another app)

You can use java from game files:
jre\bin\javaw.exe

--

OR try using beta version:

Right-click the game in your Library.
Go to Properties > Beta
Choose -> LWJGL3

And from the game files try run .exe or .jar file

Verify Integrity of Game Files

https://help.steampowered.com/en/faqs/view/0C48-FCBD-DA71-93EB

--

Or if you don’t have Java installed, you can download it here:
https://www.java.com/en/download/
or:
https://www.java.com/en/download/manual.jsp

If doesn't help:
Uninstall Java with the Java Uninstall Tool and make sure all old versions are uninstalled. Reinstall latest version of Java. Game should run fine after that.

I'll do my best to make running the game simpler, but it might take some time.

https://www.ageofcivilizationsgame.com/topic/250345-my-game-doesnt-start/