Become a human cell, gathering the necessary macromolecules and ATP to complete what you were born to do in Cytosis: A Cell Biology Game. In Cytosis you find yourself inside a cell attempting to gather resources that combine to create cell components such as enzymes and hormones.
H₂O, CO₂, H₂SO₄. Water, carbon dioxide, sulfuric acid; these are molecular formulas most people would recognize. Well, maybe not sulfuric acid, but for some reason that one has always stuck in my mind. Most people could then tell you that H₂O means water and that it is composed of molecules with two atoms of hydrogen and one oxygen. However, if you ask people what makes a hydrogen atom hydrogen they would probably stare at you with a blank face. In Subatomic, by Genius Games, you go even smaller to create the atoms themselves.