Single-player games like Within the Cosmos
Below are 11 single-player Steam games similar to Within the Cosmos, 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 Within the Cosmos page.
Ranked picks
- 1
The Outer Worlds
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares RPG with Within the Cosmos.
The Outer Worlds is an award-winning single-player RPG from Obsidian Entertainment and Private Division. As you explore a space colony, the character you decide to become will determine how this player-driven story unfolds. In the colony's corporate equation, you are the unplanned variable.
- 2
Humanity Lost
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares Action and Adventure with Within the Cosmos.
Will you save humanity? You are on a mission to find a new planet for humans to inhabit. In this story driven FPS space opera you will explore open world planets, find weapons, upgrade your character, and befriend alien species.
- 3
The Outer Worlds: Spacer's Choice Edition
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares Action and Adventure with Within the Cosmos.
The Outer Worlds: Spacer’s Choice Edition is the ultimate way to play the award-winning RPG from Obsidian Entertainment and Private Division. Including the base game and all DLC, this remastered masterpiece is the absolute best version of The Outer Worlds.
- 4
Deep Space
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Within the Cosmos.
You are entrusted with the role of one of the elite captains, put on a high-tech mech suit suitable for travel into space and go on an exciting journey.
- 5
Mass Effect™ Legendary Edition
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares Action and RPG with Within the Cosmos.
The Mass Effect™ Legendary Edition includes single-player base content and over 40 DLC from the highly acclaimed Mass Effect, Mass Effect 2, and Mass Effect 3 games, including promo weapons, armors, and packs — remastered and optimized for 4K Ultra HD.
- 6
Call of Duty®: Infinite Warfare
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares Action and Adventure with Within the Cosmos.
Infinite Warfare delivers three unique game modes: Campaign, Multiplayer, and Zombies.
- 7
Mass Effect™: Andromeda Deluxe Edition
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares Action and RPG with Within the Cosmos.
Return to the Mass Effect universe & lead the first humans in Andromeda on a desperate search for our new home.
- 8
Terminator: Resistance
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares Action and Adventure with Within the Cosmos.
Terminator: Resistance, is a first-person shooter set during the 'Future War' scenario that was only glimpsed at in the iconic films, 'THE TERMINATOR' and 'T2: JUDGMENT DAY'. The machines are destined to lose, but at what cost?
- 9
Deus Ex: Game of the Year Edition
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares Action with Within the Cosmos.
The year is 2052 and the world is a dangerous and chaotic place. Terrorists operate openly - killing thousands; drugs, disease and pollution kill even more. The world's economies are close to collapse and the gap between the insanely wealthy and the desperately poor grows ever wider.
- 10
Fallout 4
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares RPG with Within the Cosmos.
From Bethesda Game Studios, the award-winning creators of Starfield and The Elder Scrolls V: Skyrim, comes Fallout 4. A landmark in open-world RPG design and winner of over 200 ‘Best Of’ honors, including the DICE and BAFTA Game of the Year.
- 11
Cyberpunk 2077
Single-player alternative to Within the Cosmos — playable solo, no multiplayer required. Shares RPG with Within the Cosmos.
Cyberpunk 2077 is an open-world, action-adventure RPG set in the dark future of Night City — a dangerous megalopolis obsessed with power, glamor, and ceaseless body modification.