Single-player games like Summa Expeditionis
Below are 9 single-player Steam games similar to Summa Expeditionis, 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 Summa Expeditionis page.
Ranked picks
- 1
Valorborn
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Action and Strategy with Summa Expeditionis.
Dive into a living medieval fantasy sandbox RPG where the world moves with or without you and factions rise and fall. Become a thief, hunter, or sellsword, survive alone or with a party, and shape your story in a fully enterable world where every building, cave, and road hides opportunity or danger.
- 2
Warlord: Britannia
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Action and Strategy with Summa Expeditionis.
Lead a Roman expeditionary force into the heart of Ancient Britain! Recruit, promote, and upgrade your legionaries while constructing a series of fortified marching camps. Use Roman tactics and strategies to conquer the entire island and become Warlord!
- 3
Grand Ages: Rome
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Strategy and Simulation with Summa Expeditionis.
As Governor of a Roman Province in the time-honoured Roman Empire, its fortune very much lies in your hands. Choose one of five Roman noble families such as Caesar’s Julii with different abilities to accomplish the comprehensive missions.
- 4
Citadelum
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Strategy and Simulation with Summa Expeditionis.
Citadelum is a city builder set in legendary Ancient Rome. Build your own settlement, gather resources and evolve it into a magnificent city. Explore the world, trade and lead your mighty legions in epic tactical battles. Earn the favor of the Gods or challenge them, if you dare.
- 5
Stronghold HD (2012)
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Strategy and Simulation with Summa Expeditionis.
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.
- 6
Nova Roma
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Strategy and Simulation with Summa Expeditionis.
The glory of Rome is at your fingertips in this city-building game where you must appease the gods, enact laws, and develop complex supply chains to meet the needs of your citizens.
- 7
Satisfactory
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Strategy and Simulation with Summa Expeditionis.
Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven!
- 8
Imperium Romanum Gold Edition
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Strategy and Simulation with Summa Expeditionis.
The city builder strategy game Imperium Romanum is set in the time-honoured Roman Empire. As governor of a Roman province, you will devise a strategy to build a well organised, prosperous and commanding settlement. Its fortune very much lies in your own hands.
- 9
RimWorld
Single-player alternative to Summa Expeditionis — playable solo, no multiplayer required. Shares Strategy and Simulation with Summa Expeditionis.
A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.