[WatchDogs]

From AlliedModders wiki:
https://wiki.alliedmods.net/Category...emod_scripting

And other people plugins's source code.


And for beginners (Old API):
https://www.youtube.com/watch?v=0uq5VUoVWwo&t=3s


The video is an easier way to learn.
It has about 20 video parts of learning step by step ;)