Games like Space Siege

"Dungeon Siege III" is a fantasy hack and slash game with action-RPG elements, available for PlayStation 3, Xbox 360, and Windows. The game features an intriguing story, great graphics, and a compelling soundtrack, with local multi-player options for 2 players in co-op mode through split screen. However, it has been noted for its numerous bugs and grinding gameplay.

"Greed: Black Border" is a Sci-Fi RPG with gorgeous visuals and immersive music. Play single-player or with a friend in co-op mode, battling through a war-torn universe for a powerful new energy source. Your actions will determine the fate of mankind in this hack 'n slash adventure. Grinding is to be expected.

"Blackguards" is a single-player Fantasy Turn Based Strategy game with pretty visuals and a splendid soundtrack. The game features an intriguing story of crime, drugs, and murder, with over 180 unique battlegrounds and 40+ hours of gameplay. Despite some hilarious moments and customizable characters, the game has dense atmosphere and bugs that can affect the experience.

In "The Bureau: XCOM Declassified," play as Special Agent Carter and lead your squad to investigate a top-secret facility that has gone silent. Uncover the mystery behind the radio silence, eliminate threats, and bring the facility back online to turn the tides of the secret war. This tactical third-person shooter game requires strategic planning and quick decision-making.

Chernobylite is a single-player or co-op horror shooter RPG set in a hyper-realistic 3D scanned Chernobyl wasteland. As ex-employee Igor, you'll investigate your fiancée's mysterious disappearance, facing military, stalkers, supernatural creatures, and harsh environment. Build a base, craft, manage resources and companions, and prepare for a thrilling adventure of survival, conspiracy, horror, love, and obsession.

"Halfway" is a single-player Science Fiction Turn Based Strategy game with an intriguing story and good gameplay. As the leader of a team of survivors, you must fight and outsmart the enemy aboard a colonized spaceship while uncovering the mysteries of the violent invasion. The game features tactical turn-based battles, unique characters, and an immersive storyline with outstanding visuals and fantastic music, though some grinding is required.

"Between the Stars" is a single-player spaceship action game with strategy elements. Command your crew, manage resources, and engage in real-time combat while exploring a vast, procedurally generated galaxy. Upgrade your ship, recruit new crew members, and make important decisions that will determine your fate in this immersive space adventure.

Dead Effect is a sci-fi FPS game with over 5 hours of single-player campaign, featuring 12 missions and a gripping story. Survive against hordes of zombies in Survive and Biohazard modes, and explore multiple rooms for extra items and ammo. With a unique set of achievements and the special ability of Bullet Time, prepare for an intense and immersive experience.

In "The Incredible Adventures of Van Helsing," play as the famous monster-hunter in a gothic-noir world filled with weird science and supernatural foes. Engage in humorous dialogue and exploration while customizing your character's skills and abilities, and control your ghostly companion Lady Katarina for diverse combat options. This unique action RPG offers a refreshing take on the classic Van Helsing tale.

"StarCrawlers" is a sci-fi RPG with an interesting plot, taking you to the fringes of space to complete shady jobs for megacorps. Its perfected game mechanics, procedurally generated dungeons, and innovative combat system ensure high replayability and lots of grinding. The masterful music and atmospheric visuals, complemented by dry humor, make for a fantastic gaming experience.