But one of the best space strategy games ever also happens to be one of the easiest to get into (relatively speaking), and right now is the best time to pick it up for free. Released eight years ago, Endless Space 2 is a sibling to the Endless Legend strategy series, also by developer Amplitude. And starting July 17, Endless Space 2: Definitive Edition, which comes packed with DLC and is currently selling on Steam for just under $100, is free to Amazon Prime subscribers. Endless Space 2 is a stylish interstellar strategy game. Amplitude StudiosConflict is everywhere in Endless Space 2, as it is in all 4X games, but combat isn’t the highlight here.