1. I'm trying to make a tank that can move and fire, I think I got the whole process down for that part. (Will let you know if I don't.) But I cannot find a tutorial that shows me how to make just a normal cannon that can fire an explosive round killing people at a radius with a press of a button. 2. Just in case I want to make the cannon also turn around and move up and down, how can I do that? 3. How to make an object heal and/or give HP that isn't the supply locker? I remember going on a server and there was this brick that healed/give ammo like a dispenser when I got close. 4. How can I make a gun like this gun in Half Life 2 for TF2? (Gun at 15:17) View: https://www.youtube.com/watch?v=TFRSlfBRQTA 5. How to make breakable walls? I know this is probably a whole lot to answer, so please, take your time, and if you can only answer one of these, that will do. Thanks.
For breakable walls, use func_breakable If you want something that heals you, like #3 asks for, you can use a mapobj_cart_dispenser and a dispenser touch trigger. In terms of your cannon, I think there is a prefab for something similar on the site. For the gun, your best option may be a mod
Driveable tank: https://tf2maps.net/downloads/driveable-tanks.1877/ As for a mounted gun, I have no idea if all the entities needed are in TF2 but here are some tutorials on how to make it for hl2/css: View: https://www.youtube.com/watch?v=3CIWqRkLQ3g https://www.interlopers.net/tutorials/25687?page=tutorials¶ms=25687
Tried doing this, I don't think I can do it as I was lacking a few things that I assume aren't in TF2. But still, I thank you for trying to help.