Single-player games like Antimatter
Below are 8 single-player Steam games similar to Antimatter, 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 Antimatter page.
Ranked picks
- 1
Critias Empire
Single-player alternative to Antimatter — playable solo, no multiplayer required. Shares Strategy and Simulation with Antimatter.
Turn-Based 4X-like Strategy: Build the peaceful kingdom of Atlantis into a flourishing civilization. Plan carefully or be ready to adapt as the ancient Gods of Olympus rain down floods, earthquakes, volcanoes and all types of disaster.
- 2
Colonial Winds
Single-player alternative to Antimatter — playable solo, no multiplayer required. Shares Strategy and Simulation with Antimatter.
Grow your colony from a small outpost into a thriving nation in this city-building game. Step into the shoes of a colonial governor as you build production chains, establish trade, meet the needs of your citizens, and guide your settlement toward self-rule.
- 3
CivIdle
Single-player alternative to Antimatter — playable solo, no multiplayer required. Shares Strategy and Indie with Antimatter.
CivIdle is an idle/incremental game that allows you to lead your own civilization through thousands of years from ancient times to the modern era. Expand your territory, explore a vast tech tree, build various wonders, and trade with global players: empire must grow and numbers must go up!
- 4
Workers & Resources: Soviet Republic
Single-player alternative to Antimatter — playable solo, no multiplayer required. Shares Strategy and Simulation with Antimatter.
Build a soviet republic from an impoverished country into a rich industrial superpower in a city builder with intricate production chains and a fully simulated global economy. Manage the lives of your citizens from education to work and party loyalty to criminal activity.
- 5
Kingdom Wars 4
Single-player alternative to Antimatter — playable solo, no multiplayer required. Shares Strategy and Indie with Antimatter.
It's 1347, the time of the Hundred Years' War. In this historical grand strategy and RTS hybrid you play as one of 200 minor lords across medieval Europe, Africa or Middle East. Rise up to take over your Kingdom and be crowned, then fight to preserve your empire as Black Death descends on Europe.
- 6
Ymir
Single-player alternative to Antimatter — playable solo, no multiplayer required. Shares Strategy and Indie with Antimatter.
Ymir is a 4X multiplayer strategy game combined with a city builder where each player develops a civilization of pigmen starting at the stone age.
- 7
Empires of the Undergrowth
Single-player alternative to Antimatter — playable solo, no multiplayer required. Shares Strategy and Simulation with Antimatter.
Command swarms of warriors at an unprecedented scale of warfare in this blend of RTS and base-building. Lead ant colonies against the many fearsome threats of the insect world, while building intricate nests, developing pheromone-based tactics, and evolving to meet growing dangers.
- 8
Rebuild 3: Gangs of Deadsville
Single-player alternative to Antimatter — playable solo, no multiplayer required. Shares Strategy and Indie with Antimatter.
Rebuild a ruined city in this post-apocalyptic mix of strategy and simulation. Manage survivors, scavenge for food and supplies, deal with rival gangs, illness, interpersonal strife and zombie attacks.