To hide a specific game from matchmaking, please follow these steps:

1. Open the matchmaking section in the PLINK application.
2. Locate the game you want to hide from matchmaking.
3. Perform a long tap (press and hold) on the specific game.
4. A list of options will appear.
5. From the options, select "Hide" to hide the game from matchmaking.

By following these steps, you will be able to hide a particular game from appearing in your matchmaking preferences.