In the newly updated FAQ page for their upcoming Steam Deck, Valve says that they are not interested in developers making Steam Deck exclusive titles. This startling revelation should really come as no surprise to anybody who has been paying attention to what the Steam Deck is for any length of time. It is, after all, merely a handheld PC.
Valve's remarks about this came about during a recently Steamworks Steam Deck event where developers and publishers asked some of their burning questions. One of the big questions was, "Would Valve be interested in having any Steam Deck exclusive titles?"
Their reply was short and to the point:
No, that doesn't make much sense to us. It's a PC and it should just play games like a PC.
Other parts of the posted FAQ suggest that games will get Steam Deck Verified status applied to them within a week of being released. This time frame will vary depending on how big of a release queue there is and the complexity of the titles that need to be tested.
Recently, Valve did announce that the Steam Deck was delayed by at least two months. The original plan was to begin shipping the Steam Deck to consumers in December. Those first shipments will now begin rolling out in February.