Automaton Lung (USD$14.99) by Luke Vincent
Note: I received a copy of this game for free. A refreshingly retro take on the action platformer collect-a-thon. Automaton Lung has you exploring numerous levels with a sci-fi twist, but is notable for its lack of information. Use the clues in the environment around you and your innate knowledge of video games to clear each level.
Buy on Steam for USD$14.99