Well, I don't think Shadow Complex is exactly like Metroid. Sure its an Action/Shooter title on a 2D plane, but if that makes it the same as Metroid, then you could easily say Smash Bros Brawl is the same as Metroid. Or a ton of games on the NES and SNES. I'd say its more of a game with a similar game engine, but unique gameplay in all other ways.
Also, I can't tell what the heck is going on with that 3D Dot game at all! But it definitely looks interesting still.











