Games like Sins of a Solar Empire: Trinity

"Star Ruler" is a real-time 4X space strategy game that lets you explore, expand, exploit, and exterminate across vast sectors of space. Design your own ships and fleets, research new technologies, and engage in diplomacy or warfare with alien races. With a randomly generated galaxy and a focus on emergent gameplay, each playthrough offers a unique experience.

"Star Ruler 2" is a real-time grand strategy game that allows players to build and manage their own space empire. With fully destructible planets and a procedurally generated galaxy, players can engage in interstellar warfare, diplomacy, and research to expand their territory and ensure their species' survival. The game also features a multi-threaded simulation engine, enabling large-scale battles and complex political dynamics.

In AI War: Fleet Command, you lead a small human resistance force against an AI overlord that has defeated humanity in a brutal war. With faster ships and automated defenses, your mission is to outsmart and defeat the AI subcommanders, avoiding detection by central processing until it's too late. This challenging real-time strategy game demands strategic thinking and careful resource management to overcome overwhelming odds.

Nexus 5X is a competitive 4X strategy game where 2-8 players can battle for galactic dominance in about an hour. Select unique factions, form alliances, and execute strategic moves in turn-based multiplayer, either with friends or in online skill-based matchmaking. Build your empire, control Nexus, and climb to the Galactic Throne by expanding, exploring, exploiting, and exterminating.

Endless Space is a turn-based 4X strategy game set in space. Players choose one of several unique civilizations, each with their own strengths, weaknesses, and victory conditions. Explore the galaxy, build and upgrade your empire, research new technologies, and engage in tactical space combat in this expansive and engaging game. With deep customization options and a variety of ways to win, Endless Space offers nearly limitless replayability.

"Sid Meier's Starships" is a strategy game that puts you in charge of a fleet of starships in a procedurally generated universe. Complete missions to protect planets from hostiles, build a planetary federation, and engage in tactical space combat. The game features full customization of starships and offers cross-connectivity with "Civilization: Beyond Earth".

Beyond Astra is a real-time 4X sci-fi grand strategy game. Expand your own civilization, explore captivating and mysterious planets and star clusters, interact with your citizens and other life forms and shape your destiny through nearly infinite possibilities.

Legacy of Sin: Ill-Boding is a hybrid city-building and tower defense game that seamlessly blends massive real-time battles with turn-based management of your city and lands. Set in a Renaissance world devastated by a magical apocalypse, humanity's few remaining survivors retreat before the relentless onslaught of orcish hordes. The last kingdom rallies around Aldrick, a mercenary leader promoted …

Zephon is a post-apocalyptic 4X strategy game built on Proxy’s unique tactical combat system. Guide survivors through a grimdark future, navigating unexpected disasters, eldritch horror and cyberpunk monstrosities. What will you do to survive?

"Horizon" is a single-player Science Fiction Turn Based Strategy game, offering about 4 hours of playtime. It features advanced turn-based tactical combat, full tactical ship control, and exploration of a vast, interactive galaxy with ten unique alien species. Colonize, trade, and defend your territory to expand humanity's reach beyond the known horizon.