Single-player games like Grey Goo
Below are 20 single-player Steam games similar to Grey Goo, 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 Grey Goo page.
Ranked picks
- 1
Strike VR
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
A fast action arcade game revamped into Virtual Reality. Shoot with your weapon, dodge bullets with your body, deflect bullets with your swords, and launch missiles and ultimate skills!
- 2
Supreme Commander 2
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Includes 47 Steam achievements, leaderboards, and stats!
- 3
Armed to the Gears
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Control a fully armed Mech and fight through cyberpunk cities, military bases and industrial ruins. Capture and defend territories, build turrets and structures, and wage war against powerful enemies!
- 4
Earth 2160
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
After the destruction of the EARTH in 2150, the leaders of the Eurasian Dynasty escaped on board an evacuation fleet. Now they are fighting for the survival of the human species. Their base is one large building comprising of smaller variable parts.
- 5
Supreme Commander
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
For a thousand years, three opposing forces have waged war for what they believe is true. There can be no room for compromise: their way is the only way. Dubbed The Infinite War, this devastating conflict has taken its toll on a once-peaceful galaxy and has only served to deepen the hatred between the factions.
- 6
Taur
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?
- 7
Starport Delta
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Build amongst the stars in Starport Delta, a light sci-fi strategy game that focuses on survival. Station Commanders across the universe will turn to you for guidance to expand, defend, and survive. Help them build a thriving station, but watch out, there are many dangers hiding in space...
- 8
Planetary Annihilation: TITANS
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Wage war across entire solar systems with massive armies at your command. Annihilate enemy forces with world-shattering TITAN-class units, and demolish planets with massive super weapons!
- 9
Total Annihilation
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
What began as a conflict over the transfer of consciousness from flesh to machines escalated into a war which has decimated a million worlds. The Core and the Arm have all but exhausted the resources of a galaxy in their struggle for domination.
- 10
SC2VN - The eSports Visual Novel
Single-player alternative to Grey Goo — playable solo, no multiplayer required.
SC2VN is a visual novel about the South Korean StarCraft 2 scene. You play as Mach, a foreign semi-pro trying to make it in eSports who soon learns that success in StarCraft takes more than in-game strategy.
- 11
守卫魔兽-Guardian of Warcraft
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
This is a summoning tower defense strategy game, with different abilities of monsters and traps, with different effects. the player will continue to upgrade while defending, Become stronger, and summoning more powerful monsters to resist the brave.
- 12
Click and Conquer
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Click and Conquer is a short, relaxing incremental game. Drop bombs through the fog of war, uncover hidden enemies, collect rewards, and spend currency to boost passive income, increase bombing power, and unlock new maps.
- 13
STAR WARS™ Empire at War - Gold Pack
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld?
- 14
Command & Conquer™ Remastered Collection
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Command & Conquer and Red Alert are both remastered in 4K by the former Westwood Studios team members. Includes all 3 expansions, rebuilt multiplayer, a modernized UI, Map Editor, bonus footage gallery, and over 7 hours of remastered music.
- 15
The Great War: Western Front™
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
The Great War: Western Front is the definitive WW1 strategy game. Play a deciding role in history with this real-time tactical experience as you take charge in the iconic Western Front from 1914 to 1919. Pick your faction and lead your forces to victory.
- 16
8-Bit Armies
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
8-Bit Armies is a retro Real-Time Strategy game. With a colorful, blocky voxel art style, 8-Bit Armies is Petroglyph's most fast-paced, friendly, and accessible RTS game to date. Featuring a campaign of 25 single-player missions, 12 co-op missions, multiplayer and skirmish modes.
- 17
Conan Unconquered
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
From the Command & Conquer veterans at Petroglyph comes the first ever survival RTS set in the savage world of Conan the Barbarian. Play solo or team up in multiplayer in Conan Unconquered’s action-packed co-op Mode where you build a shared stronghold and fend off the hordes together.
- 18
9-Bit Armies: A Bit Too Far
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Unleash voxel warfare in 9-Bit Armies: A Bit Too Far. Lead a modern military, build bases, unlock units, and attack in all-out war. Engage on land, sea and air in over two dozen missions, online skirmishes, or co-op. Easy to learn, a challenge to master.
- 19
Forged Battalion
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
Customize your unique faction in a new take on real-time strategy as you fight in a variety of skirmish, solo, and multiplayer battles. You are not only a commander, but also an engineer – so you have ultimate control over your faction’s units, factories, superweapons and economy.
- 20
8-Bit Hordes
Single-player alternative to Grey Goo — playable solo, no multiplayer required. Shares Strategy with Grey Goo.
From the team that brought you 8-Bit Armies comes a new fantasy RTS as fast-paced and friendly as the original! 8-BIT HORDES is a colorful strategy-arcade game that is easy to learn for players of all skill levels. Collect resources, build up and defend your base, amass your army of orcs or humans and ultimately crush your opponents!