This is a weird one: A great little free retro-shmup minigame based on the art of Star Citizen [official site], which isn't even properly out yet. But the twee factor on Hyper Vanguard Force IV is probably worth the kind of filthy lucre it's taking to make its point of inspiration.
The whole thing is playable in-browser as part of a virtual arcade cabinet created by developers Dave Richard and Christine March, who turned Star Citizen's original concept art into little pixel art designs. The plot follows pilot who's attempting to take out the pirate who stole something from her, but it's largely about shooting the shit out of space ships. You should play it.
Star Citizen has so far gotten over $75 million in crowdfunded dollars and is well on the path to $100 million by the end of this year. You've still got a while to wait for it though; It's slated to come out sometime next year.