That's about $30~ all together. I haven't installed Vanquish yet, but I'll talk about the other two quickly. House of the dying sun is incredibly fun. Flying the ship feels great and the sound design is absolutely amazing. However, it's pretty damn short and there's only one ship to fly, a fighter. You can get 3 frigates and a destroyer to add to your 'fleet' but the limited command system relegates them to being nothing more than meatshields. I wouldn't say no to a sequel that adds more to the game.
SPG Warlords is a great game, essentially, imagine Moutainblade in space. I can't really think of much to complain about. The fact that the Titans(ultimate ship class) are honestly pretty useless is kinda disappointing after all the resources you need to spend to get one running. Oh, and time advancing but ships not building while you look at the map is annoying as shit. But other than that, solid game and one of the best I've played this year. Really, the fact that something like this came out of early access boggles my mind.