Picked up Stellaris and Gloria Victis during the current Steam Sale, and bought Windward for my son (I already have it).
Stellaris is easily worth the $35 I paid for it; enough depth to keep you engaged, yet no unnecessary complications added to simulate "depth."
Gloria Victis is a low-magic, medieval MMO that is still in its Alpha; I primarily bought it because once it goes live, you won't get all of the included content. You will be able to purchase access to such via microtransactions (more detail is on their website). For $18, it's worth it to me to give them a shot. The gameplay seems good, especially for an alpha, and the graphics are definitely nice. There's no targeted attacks - you have to swing your weapon and/or aim your bow so you actually hit your target. This means you actually have to aim your bow upward to some degree, depending on how far away the intended target is.