These are the game concept icons. 

The first set, in the bubbles, can be used for images that you want to look like a sticker or to point towards a direction.

The middle set are just the normal game concept icons.

The set on the right are the game concept icons in a subtle gray tone. They are a bit smaller and can be used if you want icons to be understated. If you plan to use several icons on a slide, please use these icons.