4: Extract CelesteLauncher.zip into the game's folder (Where Steam ed the game)
5: Run "Celeste Launcher.exe" (Without the "exe" if your file extensions are hidden) and /.
6: In the Celeste Launcher, click the hammer button and choose "Convert to Steam Game". Click "Confirm" when prompted. This will make it so when you hit "Play" within steam for Age of Empires Online, it will correctly launch the Celeste Launcher.
7: Click the hammer button again and choose "Game Scan". Set the scan's location to the game's root folder. Example: "C:\Program Files (x86)\Steam\steamapps\common\Age of Empires Online" - Once it's set, run the scan. This will the rest of the game files and patch the game.
8: The game is now installed. Press "Play" in the Celeste Launcher to play the game!
hammer button and choose "Convert to Steam Game". Click "Confirm" when prompted. This will make it so when you hit "Play" within steam for Age of Empires Online, it will correctly launch the Celeste Launcher.