
1. Engine: Blender Game
- Info menu >> Render Engine box >> Blender Game
Note:
- There are menus that are only available when The Blender Game render engine is selected.

2. Add a new scene
- Info menu >> Scene box >> + sign
- Info menu >> Scene box >> New Scene Type: New
- Render Engine: Blender Game
Note:
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This scene will be used as the overlay scene.
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Objects in an overlay scene are always displayed in front of objects in the main scene.
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A HUD (heads-up display) with a health bar and a weapon reticle is an example of an overlay scene.
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The Render Engine has to be set for each scene added.

3. Give it a unique name
-
Info menu >> Scene Text box >> Name Box
Note:
- For this tutorial, I am naming it HUD