Single-player games like Insiders
Below are 10 single-player Steam games similar to Insiders, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Insiders page.
Ranked picks
- 1
Periphery Synthetic
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Adventure and Simulation with Insiders.
Explore a planetary system, synthesize new abilities, and reveal its past. This interactive EP offers a chill and non-violent metroidvania experience across procedurally-generated musical playgrounds.
- 2
The Trench
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Action and Indie with Insiders.
As captain of the Pandora sub, you must explore the Trench and retrieve data from the Neptune wreckage. But beware - the trench is home to unimaginable horrors that will test your courage. Can you survive the terrors of the deep and complete your mission, or will you become the next victim?
- 3
Galactic Mining Corp
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Action and Indie with Insiders.
Galactic Mining Corp is a unique rogue-lite, action game with crafting and base building mechanics. Head into uncharted space and discover a universe of locations to exploit for riches! Use your profits to expand your HQ, hire a crazy work force, obtain new drill components and upgrade everything.
- 4
Ocean Keeper: Dome Survival
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Action and Indie with Insiders.
Explore dungeons, fight hordes of monsters and survive on a huge map. This is Ocean Keeper - an action roguelike with tower defense elements. Mine resources in caves, customize your Mech Spider, upgrade different weapons and face dangerous bosses that won't leave you a chance!
- 5
Diluvion: Resubmerged
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Action and Indie with Insiders.
Diluvion is a 3D deep sea, Jules Verne inspired, exploration game with RPG elements and thrilling submarine combat. As the Captain of your own vessel, you must grow and manage your crew as you search for the secrets of the past in a hauntingly beautiful flooded world.
- 6
Genesis Alpha One Deluxe Edition
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Action and Indie with Insiders.
Hyperjump into the dark recesses of space with Genesis Alpha One - a roguelike FPS where you must build, maintain and navigate your ship through a galaxy filled with hostile alien and human threats. Explore, create and survive the militarized space race in order to secure humanity’s future.
- 7
Raft
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Indie and Adventure with Insiders.
Raft™ throws you and your friends into an epic oceanic adventure! Alone or together, players battle to survive a perilous voyage across a vast sea! Gather debris, scavenge reefs and build your own floating home, but be wary of the man-eating sharks!
- 8
Starpoint Gemini Warlords
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Action and Simulation with Insiders.
Strategy from the front lines! Starpoint Gemini Warlords combines 3rd person capital spaceship combat with 4X strategy and RPG gameplay elements. Build mighty war fleets and send them into battle or lead them into combat yourself. Become the Warlord and conquer the Gemini system!
- 9
AstronTycoon
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Indie and Simulation with Insiders.
Take the role of an astronomer exploring the depths of the universe. Build large telescopes to explore distant stars. Discover a habitable planet or an unknown anomaly in a far corner of the galaxy. Get scientific grants, publish your results and explore new technologies.
- 10
AstronTycoon2: Ritual
Single-player alternative to Insiders — playable solo, no multiplayer required. Shares Simulation with Insiders.
Build a village on hallowed grounds, in the year 2000 BC. Take care of the needs of the villagers and pilgrims who will want to visit the holy place. Provide enough food to run the village. Build monuments of various shapes from different types of stone. Provide the villagers with clothing and tools