Instructions work on both the Steam website and the desktop client.
When a game is hidden, it wont show up in your library.
Hiding a game technically places it into a special game collection thats hidden by default.

Heres how to unhide games in Steam:
Open Steam, and clickView.
Your hidden games will appear.
Right-click theone you want to unhide.

SelectManagefrom the context menu.
To play the game without unhiding it, clickPlayinstead of Manage.
The game is no longer hidden.

To view all of your games, clickShow all collections.
Repeat steps 3-4 to unhide additional games.
What Are Hidden Games on Steam?

The hidden game feature provides a way to hide games from your Steam library.
Do Hidden Games Show Up On Your Profile?
When you hide a game, you add it to a special hidden collection titled HIDDEN.

Since hiding a game adds it to a special collection, it doesnt affect your profile.
