You can now Search either the Forum or Games by using the global site search in the header. By default, for now, it is set to Forum. But you can click a button to switch it to games.
If you simply click the magnifying glass in the navbar, you'll be sent to the Advanced Search page (again, set to Forum by default). There is a tab to switch the search to Games, which will allow you to search by Title or filter by:
Check out the new Advanced Search for Games