1. Engine: Blender Game
- Info menu >> Render Engine box >> Blender Game
- There are menus that are only available when The Blender Game render engine is selected.
2. Viewport Shading: Textured
- 3D View menu >> Viewport Shading box >> Textured
- Viewport Shading Texture renders the game objects with the textures you add.
3. Material Shading: GLSL
- Properties menu >> Render button >> Shading tab >> GLSL button
- The game engine needs GLSL to use normal maps.