Now that Construct 3 has a 3d camera with basic shape objects, ray casting might be obsolete for some users I'm lowering the price considerably!
There are plenty of things you can do with this that you don't get easily with Construct 3's native 3d objects.
1. Dynamic lighting. You can use light objects that light up your walls in real-time
2. Lots and lots of built-in features like particle emitters, weapons, doors, keys, enemy AI etc.
3. It's genuine ray casting. No actual 3D or Web GL going on for that "fake 3d itch"
4. You can still use the ray casting Construct 2 templates
5. FPS Weapons and weapon switching.
6. Lots of effects like blood splatters, bullet holes, debris!
7. Fully documented game templates with how-to videos and instructions
8. Lots of assets all free to use with or outside of the template
Lots more too.
Thank you so much to everyone who got this and helped contribute to it. It was a lot of work.
It's available here.
https://uberdroidgames.itch.io/construct-ray-casting-game-kit