Valve has released an update for the Steam Deck, which adds a new lock screen to the handheld PC, as well as several other changes.
“We’ve added the ability to turn on a lock screen and PIN for Steam Deck,” Valve writes.
“You can set this to show up on wake, boot, login, and/or when switching to Desktop mode. Sorry little bro/sis, you won’t be able to borrow your sibling’s Steam Deck and mess with their save games anymore!”