Single-player games like Infectra
Below are 10 single-player Steam games similar to Infectra, 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 Infectra page.
Ranked picks
- 1

Kingdom Of Force
Single-player alternative to Infectra — playable solo, no multiplayer required. Shares Strategy with Infectra.
KOF is a magic background real-time strategy game, which is based on the method of dispatching troops to occupy the city, and combines the elements of resource collection, construction, upgrading, tower defense and so on.
- 2

Scarecropia
Single-player alternative to Infectra — playable solo, no multiplayer required. Shares Strategy with Infectra.
Here is Scarecropia! Lead at most 400 people to build a settlement. Arm your village to fight against the Goblin army, or invest limited resources in yourself to become unparalleled! Take every cost to survive!
- 3

Stronghold: Definitive Edition
Single-player alternative to Infectra — playable solo, no multiplayer required. Shares Strategy with Infectra.
Greetings sire! Your stronghold awaits you. Build a castle economy, besiege unforgettable villains and return to the 'castle sim' that started it all. Experience this classic RTS with upgraded visuals, modernised gameplay, Steam multiplayer and a new campaign.
- 4

Stronghold HD (2012)
Single-player alternative to Infectra — playable solo, no multiplayer required. Shares Strategy with Infectra.
The original castle sim, Stronghold HD allows you to design, build and destroy historical castles. Engage in medieval warfare against the AI in one of two single player campaigns or online with up to 8 players.
- 5

ReEarth
Single-player alternative to Infectra — playable solo, no multiplayer required. Shares Strategy with Infectra.
ReEarth is an exciting TD & (RTS) indie game. Here, you will play as humanity's last hope. You will fend off the oncoming swarms by continuously building your base and dispatching various types of units. Prepare for the challenge and save the future of humanity!
- 6

rymdkapsel
Single-player alternative to Infectra — playable solo, no multiplayer required. Shares Strategy with Infectra.
Build a space station. Command the tiny crew. Explore the galaxy. A meditative space strategy game.
- 7

They Are Billions
Single-player alternative to Infectra — playable solo, no multiplayer required. Shares Strategy with Infectra.
They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?
- 8

IDUN - Frontline Survival
Single-player alternative to Infectra — playable solo, no multiplayer required. Shares Strategy with Infectra.
A defense RTS where you can move turrets at will. Extract resources, upgrade technology, and defend against enemy swarms in a gripping space campaign. Hold the line, set up your turrets, and brace for screen-filling hordes!
- 9

Squeakers
Single-player alternative to Infectra — playable solo, no multiplayer required.
Water is flooding the world. Build your own way to climb higher and higher. Maybe there is a chance of survival after all. Give yourself a try! Help those boars reach the highest level.
- 10

Squeakers II
Single-player alternative to Infectra — playable solo, no multiplayer required.
Water is flooding the world. Build your own way to climb higher and higher. Maybe there is a chance of survival after all. Give yourself a try! Help those boars reach the highest level.