Stellaris

Stellaris is a science fiction grand strategy game developed by the Paradox Studios team. Apart from the outer space strategy basis, the game has 4X features. Procedurally generated conditions make each game session unique where all your decisions result in unprecedented consequences. You can use diplomacy to establish contacts with alien races. You're expected to expand your knowledge base by sending science crews all over the galaxy for investigating anomalies and gaining extraterrestrial technologies. Your playable characters have adjustable personality characteristics depending on which your empire will grow. As you discover more planets, this can be linked to your empire by building space stations and navigating between them by mapped routes. Stellaris is constantly updated with free content which means there are no limits for your advancement and game's replayability.