In Siege

Half Life Alyx addon by makah
This is one I played many times. It is a very long one to play as it will take 2 hours to finish.
One can say it's an adventure as you start in a building then move to a street battle and then back to a building where it room to room combat and then again back to street battle.
It's a must have addon for sure.

https://steamcommunity.com/sharedfiles/filedetails/?id=2146891421&searchtext=in+siege

https://steamcommunity.com/app/546560/workshop/

https://cw3host.com

https://cw3webdesign.com