Gamemaker - Old Materials (no longer supported)

Offline materials written using GM 8.1 Lite:

1. Introduction to GM
2. Movement
3. Collision
4. Alarms Variables

Online materials written using GM 8.1 Lite:

1. Sprites & Spritesheets
2. Objects
3. Backgrounds & Views
4. Draw Step Test
5. Paths
6. Alarms & Timelines

Materials written using Studio 2:

1. Sprites Objects Rooms
2. Movement
3. Collisions
4. Inputs
5. AI
6. AI2
7. AI3
8. Platformer
9. Terrain gen

More external web reference material: GML Overview, GML Reference, YoyoGames GM Tutorials, Shaun Spalding GM Tutorials