How to launch Steam games from Spotlight?
You can make your Steam games appear under Spotlight as follows:


Open Steam.app, go to Library, right click on the game entry and select Create Desktop Shortcut from the content menu. An alias for the game is created on the Desktop.





After the shortcut is created, it can be moved to any location on hard disk (as long as the location is indexed by Spotlight) and it will appear in Spotlight search results.