Shootorials are a part of Kongregate Labs. They are intended to help people new to flash development. It guides a person through the making of a game called "Shoot!", a very basic game.
The Shootorials are tutorials for learning basic ActionScript and do not require any prior knowledge. There is one Shootorial series for learning AS2 and another for AS3. Both series describe how to create a simple side-scrolling shooter called Shoot.
There are 9 Shootorials in each series, numbered from 0 to 8. Shootorial #0 does not teach ActionScript, but are instructions and tips for using the Adobe Flash CS3 program. The tutorial starts at the basic level, even with instructions for downloading a free trial version of the program. Although there are newer versions of Adobe Flash available, the instructions are still helpful for people using newer versions.
Shootorials #1-#8 teach ActionScript, each of them assuming that the user has gone through the previous one. The tutorials consist of step-by-step instructions for creating a basic side-scroll shooter. They cover all the steps, from constructing a Flash game file, coding the game to publishing your work as a .swf file. You don't need any knowledge of programming, as the tutorials cover basic ActionScript coding. Everything you need to know about how to write simple code is explained, like variable types, classes, sprites, functions, arrays etc.
The template used for creating the Shootorials has been released, so that other users can create additional tutorials. It's sort of a tutorial for creating tutorials. The AS2 Shootorials was created by Kongregate and after the template was released, a user called "Moly" was kind enough to translate the series to AS3.