So if you haven't heard Shadow Complex Remastered is free this month. If you never heard of it, it more or less plays like the 2D Metroid games or Castlevania post Symphony of the Night. Only downside is you need to install Epic's game launcher & create a new account; but shit, free game! https://www.epicgames.com/shadowcomplex/
To be fair their launcher is used for the ue4 engine and the marketplace, where you can buy assets for ue4. I don't remember any games on it before, so I guess they decided to just add to it instead of making a new thing.