Single-player games like Second Sun
Below are 18 single-player Steam games similar to Second Sun, 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 Second Sun page.
Ranked picks
- 1
Borderlands 4
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Adventure with Second Sun.
Borderlands 4 is a mayhem-fueled looter shooter, jam-packed with billions of weapons, deadly enemies, and intense co-op action. Break free from a dangerous hidden planet as one of four new badass Vault Hunters.
- 2
Subell's Abyss
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Indie with Second Sun.
Subell's Abyss is a sandbox looter shooter where everything is an item. Capture any enemy you like and summon it in combat, or steal the magic missiles it shoots and fire them from your gatling gun. Experience near infinite character-building potential in a mysterious world.
- 3
Lonely Planet
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Adventure with Second Sun.
A Sci fi looter shooter. You have crashed on a strange planet, your spaceship parts scattered across the mystical world. Collect weapons, explore the world, clear dungeons, interact with NPCs and fight bosses to save the planet's inhabitants and repair your ship!
- 4
Tiny Tina's Wonderlands
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Adventure with Second Sun.
Embark on an epic adventure full of whimsy, wonder, and high-powered weaponry! Roll your own multiclass hero then shoot, loot, slash, and cast on a quest to stop the Dragon Lord.
- 5
The War Machine
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Indie with Second Sun.
A roguelike FPS blending arcade action with dark corporate satire. Deploy as a remote operator for Corperal, master seven characters and weapons, build synergies from 80+ items, conquer five hostile regions through endless escalating waves and regional bosses, and balance the Corperal stock ticker.
- 6
Blast Judgment
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Indie with Second Sun.
Wield an unholy arsenal in this FPS Roguelite. Plunder arcane relics and practice forgotten rituals to take on armies of twisted foes. Seek the cruel gods that pulled you from your grave, and inflict your BLAST JUDGMENT.
- 7
Deep Rock Galactic
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action with Second Sun.
Deep Rock Galactic is a 1-4 player co-op FPS featuring dwarven space miners, procedurally-generated destructible environments, and endless hordes of alien monsters. Explore cave systems, mine for minerals, and work together to survive!
- 8
DROSS
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Indie with Second Sun.
DROSS is a procedurally Generated FPS, set in a derelict facility infested with alien bugs. Explore, collect powerful weapons and equipment, to upgrade your gear and fight the Dross.
- 9
The Elder Scrolls II: Daggerfall
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and RPG with Second Sun.
THE GREAT MACHINE AWAKENS
- 10
Serious Sam 4
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Indie with Second Sun.
Serious Sam 4 reignites the classic FPS series in a high-powered prequel loaded with an explosive arsenal, intergalactic carnage, and perfectly timed one-liners.
- 11
HELLGATE: London
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and RPG with Second Sun.
The return of a sensational game! Hellgate is an action RPG game you have been waiting for. Since its first release Hellgate won the hearts of thousands of fans and now it's time to bring back memories and dip into the near future of 2038. For all mankind!
- 12
Destiny 2
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Adventure with Second Sun.
Destiny 2 is an action MMO with a single evolving world that you and your friends can join anytime, anywhere, absolutely free.
- 13
Diablo® IV
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Adventure with Second Sun.
Join the fight for Sanctuary in Diablo® IV, the ultimate action RPG adventure. Experience the critically acclaimed campaign and new seasonal content.
- 14
The Elder Scrolls IV: Oblivion Remastered
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares RPG with Second Sun.
Explore Cyrodiil like never before with stunning new visuals and refined gameplay in The Elder Scrolls IV: Oblivion™ Remastered.
- 15
Serious Sam 3: BFE
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Action and Indie with Second Sun.
Serious Sam 3: BFE is a prequel to the original indie fast action FPS and Game of the Year sensation - Serious Sam: The First Encounter!
- 16
Oblivion
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Indie and Adventure with Second Sun.
Oblivion is a short, story-driven first-person horror game. Uncover the truth hidden within an abandoned school — but beware, some memories were never meant to return.
- 17
Pax Nova
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Indie with Second Sun.
A sci-fi turn-based 4X strategy game where you lead the fate of one of several factions divided between three races. Explore new worlds and new star systems filled with exciting secrets as well as dangers. Build cities, expand your influence and fight great battles on land and in space.
- 18
Dawn of Andromeda
Single-player alternative to Second Sun — playable solo, no multiplayer required. Shares Indie with Second Sun.
Dawn of Andromeda is a pausable, real-time 4X space strategy game providing an accessible, fun and immersive experience, introducing fresh ideas to the genre. Build your empire, colonize new planets, interact with other factions and characters, research technologies and build great fleets.