Steam Share not giving me access to one of the games

My friend used the family share feature in Steam to give me access to his games. When I login to my account, I can play all his games, such as Modern Warfare 3, but I can't seem to access Modern Warfare 2, which asks me to purchase it instead. He has the game, as both the pictures show the games as "from the account of hi", which is his username. What could be causing this? All answers appreciated.
Best Answer
As per the Family Sharing FAQ:
Can all Steam games be shared with friends and family?
No, due to technical limitations, some Steam games may be unavailable for sharing. For example, titles that require an additional third-party key, account, or subscription in order to play cannot be shared between accounts.
A game might not be available for sharing due to several reasons.
A little more info can be found here:
Free to play games and any purchased DLC for those games is also not supported for Family Sharing.
In addition, if your account has a VAC ban, you will be unable to share any VAC protected games.
Additionally, as stated here, "PC versions of Activision games will only be playable in the region in which they were purchased". Since the region you're playing in is checked through your IP address, using a VPN can also restrict your access.
Pictures about "Steam Share not giving me access to one of the games"



Why is shared library locked on Steam?
What Causes \u201cSteam Shared Library Locked\u201d Error? Firewall interference \u2013 Many times the firewall start causing issues and blocks the internet files for accessing so, this can be a reason responsible for the remote play together shared library locked error message.Can 2 people use 1 Steam?
Can multiple users play simultaneously on one Steam account? Steam does not support multiple players using one Steam account simultaneously - games associated with a Steam account are licensed for the sole use of the account holder.The QUICKEST way to Share Games on Steam [2021]
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