Run the step from Method 1 again. Steam will see the file is officially missing and pull a fresh, clean version from the cloud. 4. The "Outsider’s Warning" (What NOT to do)
If you are playing a specific edition of the game, you can share whether you are using the or the standard version to check for edition-specific patch requirements. dishonored steamapidll is missing
Purchase the game on Steam (it frequently goes on sale for $2–$5). The legitimate version will never have this issue permanently. Run the step from Method 1 again