Has anyone had experience creating a new mod based on the TF2 SDK? This isn't specifically mapping-related, but I'm posting here in case there's a workaround for my current situation: I'm attempting to recreate QPong for TF2. The objective of the game is to move a ball using your weapon towards the opposing team's goal. I've tried using prop_physics and prop_physics_multiplayer, but whenever the ball is in motion the player can get stuck on it until it moves completely through the avatar or the player attacks it. What I want to happen is the player to be pushed away while the ball is in motion. Also, if the ball is moving at high velocity, it should be able to crush the player instantly. I found this article explaining how to modify the multiplayer physics, but I'm unable to figure out what TF2 files (e.g. trigger_capture_area) to include in the HL2MP code base. Unless there is another workaround using Hammer, I'm unable to make this game type. There are other game type scenarios that I'd like to build on top of TF2, but if I don't have guidance on compiling the TF2 game source then I'm stuck on these as well.