SourceForts is a Half Life 2: Deathmatch mod where Combine and Rebels face off in capture-the-flag action with a big twist. Players build bases and other structures with blocks and plates in the "build phase" to protect themselves and their team's flag (which is actually a ball), and then duke it out and try to capture the enemy's flag in the "combat phase". Once the combat phase has ended, it's back to build, where players can repair, improve, and change their creations to ready them for the next combat phase.
SourceForts Classic 1.0 - Release Candidate 4
SourceForts Classic 1.0 Release Candidate 4
This is a pre-release version, a direct upgrade/port of SourceForts 1.9.4 to Source SDK 2013.
You can see the changelog here: Pastebin.com
Note: This installer, while it includes all the files for all versions, is packaged as a Windows executable. If you're on macOS/Linux, you might want to download the 7z version of this file.