Top similar games like System of Sentinels:

A space action-adventure unlike any other: navigate your spacecraft through a galactic-scale mystery. Make sure to loot, craft and upgrade your space fleet. Play the story campaign or test your skills in vicious arena modes against AI opponents.

Control your Hero to aid your Turrets and Traps in battle in this grim, dark Tower Defense & Action RPG with a scifi-grindhouse aesthetic. Create deadly weapon barrages and fuse together Bleed, Burn, Shock, Freeze, Stun and many more elements to annihilate your enemies.

Landinar: Into the Void is a top-down space-adventure-RPG. You are recruited as a rookie bounty hunter in the oppressive Landinar Empire. On your journey through the quadrant you will meet diverse characters, build your own spaceship and choose your battles.

Explore the farthest reaches of Human Space in this open-world space adventure. Compelled to journey to the Galactic Core by a mysterious hyperintelligence, you must fight your way through dozens of star systems teeming with clashing empires, expansionist AIs, and fearsome xenophobes.

Starcom: Unknown Space is an action RPG of space exploration and adventure. Build your own starship while discovering an epic story in a universe of strange mysteries, alien factions and uncharted worlds.

Space Defender is a top-down 2D arcade space shooter with some RPG elements.

Take control of Nara on a quest to destroy the dark cult that created her. Unlock devastating weapons & mind-bending abilities in an evolution of the space-combat shooter. Along with Forsaken, her sentient starfighter, explore ancient temples, engage in zero-g combat & venture beyond waking reality.

Blast your way through an Isometric Open World Galaxy. Fly seamlessly to space. Lead your chosen faction in ground and space battles. Stop the imminent Collapse of civilization... Or let it all fall into ruin.

An underground adventure with magic and fantasy-like monsters with a story where actions affect the outcome

Travel through space in your own spaceship, land on planets and moons, talk to NPCs, perform various tasks, collect scientific data, gather minerals, acquire better equipment, upgrade your ship, advance your skills, and delve into the main storyline.

Suddenly thrown into an unknown galaxy, you must explore, fight or befriend aliens and transform your ship from a small survey vessel into a powerful battlecruiser to unravel the mystery of the forces that brought you here and find your way home.

◼️Fragments, an action-adventure RPG where puzzle-solving and survival take center stage. Your mission is to uncover elusive fragments of your memories, unraveling the intricacies of your current existence and the extraordinary nature of being a mnemonist

Explore a vibrant world in this action adventure RPG where you get embroiled in a war between the 7 major races of the rainbow world.

BlazeSky is a space opera action RPG that tells the story of one person changing the fate of an entire galaxy. Explore stunning hand-crafted star systems, fight against strange alien races, and negotiate with key allies in this fully voice acted epic adventure.

You are a pilot, seeking revenge on your deceitful father who threw you into unknown space. Can you find your way back and get revenge? Experience a mix of 2D topdown space adventure and explore planets to discover quests, negotiate trades, mine, hunt and survive in an expanding universe.

Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters.

Oldschool action open-world sci-fi with a unique storyline, frenetic battles, crude humor, loose morals and cows.

Liberty Fighters is a fast-paced top-down extraction shooter with mixed RPG elements. Explore the vast open world space, loot gear or materials and sell it for the best price. Upgrade ships or buy new ones to fight in action tense space combat missions.

Volatile is a space exploration adventure game which, at its core, plays with the importance of actions and consequences.

SpikerMan is an RPG with a large explorable world, colorful characters, and uses the LMBS (Linear Motion Battle System), a combat system that takes place in real time. Use a variety of attacks that can be equipped at once by using a combination of one button and holding down the movement buttons. 

3030 Deathwar is a unique mix of Adventure and Space Sim. Explore star systems, mine and hunt pirates in top-down mode. Leave your ship and switch into classic Adventuring mode, where you explore derelicts, talk to shady characters or head over to the space bar for a drink.

A Gameboy Color and Anime inspired adventure game with RPG elements. Find magic powers on the go and obtain special ones to defeat your enemies and clear puzzle-filled dungeons in a semi-open world of dreams and nightmares. The Story of a NEET guy who suddenly acquired magical girl powers.

Subdivision Infinity is an immersive and pulse pounding sci-fi space shooter featuring stunning graphics and tight spaceship game play. Hunt down and destroy enemy spacecraft, crush capital ships, mine asteroids for rare minerals, and find blueprints to craft amazing new vessels!

Be NEARLY vaporized, crushed, blown to pieces, flame broiled, and electrocuted using your incredible targeting skills and class 1 fancy flying to keep you alive in this SHMUP that brings back the essence of the classic arcade shmups!

Interstellar war breaks out between the fox-eared Fuchians and the vile rabbit-like bunnoids, and Kimi, a Fuchian cadet is thrown into the thick of battle. Follow her tale as she fights in ground and space combat in this story driven sci-fi JRPG and shape her fate in with your actions and inaction.

SHADE Protocol is a 2D cyber-fantasy Metroidvania where music, code, and combat collide. Swap between DAWN and SHADE forms to unleash devastating abilities, wield Instruments as weapons, and rewrite reality itself in a world on the brink of annihilation by the SHADE Protocol.

OnSlaught is a fast-paced third-person space game infused with the chaos of classic boomer shooters! Rip through fleets of horrifying alien ships and obliterate destructible environments as you shoot, grapple, and bring carnage to your creators.

Rebel Galaxy is a swashbuckling space adventure, with action-packed combat, exploration, discovery, trade, and “negotiation” with the outlandish denizens at the edge of the known universe.

Take on the role of Nora Harwood, member of Everreach’s Security Division, on a mission to secure the colonization process of Eden and investigate mysterious incidents! Everreach: Project Eden is a fast-paced, story-driven action-RPG set on the visually stunning Planet Eden.

You are an independent mercenary and explorer living on the harsh surface of Largitas. Upgrade and customize your equipment in preparation to fight hostile operators, explore locations on the planet whilst navigating hazards, and interact and connect with the people forced to live here.

Experience the award-winning space saga. Travel to hyperspace, discover alien worlds, and meet an eclectic cast of characters. Find out what happened after the Ur-Quan invasion. And if the war still rages, fight for Earth and the Alliance of Free Stars!

Locked away in the most secure prison in the galaxy, with little hope of escape, Gail Pilgrim faces the most difficult ordeals of her life. Her only hope lies in trusting those who she has come to regard as her friends.

Defend Terra against the onslaught of hostile invaders in this 2D top-down space shooter. Upgrade and empower your ship's different systems to stand a chance against the growing threat. If you fall, Terra falls, and the rest of the galaxy will soon follow.