More than 75% of Steam games tested are playable or verified on the Steam Deck. The ratio of verified games has dropped over time, possibly due to the increasing number of games being tested, including less popular ones. The verification process requires games to fully support controllers, have readable text on the Steam Deck's screen, and run well on the device's hardware. The Steam Deck's compatibility with non-Steam games, such as those from GOG, is also a topic of discussion.