A guest will have access to the lender's DLC, but only if the guest doesn't also own the base game. Guests may not purchase DLC for a base game they don't own. Any player may purchase, trade, earn, or otherwise acquire in-game content while playing a game, but in-game items cannot be shared between accounts. These items remain the property of the account that purchased or acquired them, whether borrowing or lending the base game. , Your library is your gaming history it should be a pleasure to peruse. The new Steam library makes it quick and easy to explore, sort, hide, and feature your games., Starting today, the new Steam Library features are available to everyone. A hearty thank you to everyone who tried out the Library during the beta!.