There are some things that immediately grab your attention, and we'd classify the following as one of those things: God of War NES version, free of charge. It may seem unlikely, but that's exactly what indie developer Holmade Games has produced.
PlayStation 3 owners are likely to be familiar with the God of War series set in ancient Greece, which includes lots of battles with the gods. Holmade Games decided that it wanted to produce a NES 'demake' called Bit of War in dedication to the originals, and as a result it has been a side-project for a number of years. It's taken five years to develop as the intention has always been to release this game for free, so it was often neglected for other projects. It's now complete, and features all of the 8-bit sprites and chip-tunes that you may expect.
Although it's a free PC download, its NES vibe is undeniable. The trailer is below, while the game's details can be found on its web page. http://www.holmadegames.com/bitofwar.html