This has been over a year long project for me to build this on and off on my free time.
Welcome to 3-stage map cp_ambush. Each stage has 2 CP's that you need to capture in order to advance. After capturing all 6, you win the game. As RED, naturally you have to stop BLU from capturing!
Still wip, but good enough to test on. Check it out at TF2 workshop on Steam. https://steamcommunity.com/sharedfiles/filedetails/?id=2007331583