

This will manually install the XNA Framework 4.0 onto the system without the chance for Steam to run an error or have permissions problems.Īfter that, the game should run just fine. Launch the file xnafx40_redist.msi (doubleclick or select and hit Enter).

This will open a File Explorer window at the game's installation directory. If everything checked out okay, Navigate to your game installation directory by clicking on Browse Local Files from that same window.

In your Steam library, right-click on Terraria > Select Properties > Click on Local Files tab at the top > Click on Verify Integrity of Game Cache. Running the game as Administrator is fine for first launch, but is a bad long-term solution. What has happened is that the XNA Framework is missing or your Terraria game installation did not update correctly.
