With the Steam Deck's announcement last week, Valve promised the console will allow users to play their Steam library from a portable system.
But, if the Steam Deck were to release today, it would be unable to play some of the biggest games right now.
Steam Deck Currently Unable To Run Rainbow Six Siege, Apex Legends, PUBG Among Others
According to ProtonDB, Valve's system will not be able to play some of Steam's most popular games like Rainbow Six Siege, Destiny 2, Apex Legends, and PUBG.
The issue that is impending these games is Steam's anti-cheating software that is pre-built into the preinstalled, default SteamOS.
If users were to start running these games, the Linux-based system would prevent players from logging into online servers, thus making the Steam Deck unable to run these games.
However, this problem is likely to be resolved before the launch of the handheld device. Valve claims that the Steam Deck will have an updated version of SteamOS:
It comes with Proton, a compatibility layer that makes it possible to run your games without any porting work needed from developers. For Deck, we're vastly improving Proton's game compatibility and support for anti-cheat solutions by working directly with the vendors.
Valve is unlikely to release a console that does not run its most popular games. And it is almost a guarantee that the company will not place all responsibility on the developers to resolve this problem.
As we approach the Steam Deck's launch, we should gain a clearer picture of how Valve attempts to resolve this obstacle.