Single-player games like Extinction Day
Below are 11 single-player Steam games similar to Extinction Day, 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 Extinction Day page.
Ranked picks
- 1
Shadows of Forbidden Gods
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Simulation with Extinction Day.
Take on the role of a Dark Elder God and lead your agents to bring about an apocalypse in a fantasy world. Work in the shadows, avoiding the heroes who will try to stop you, as you bring about plague and famine, ice age and volcanic destruction, madness and never ending night.
- 2
Fantasy Map Simulator
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Indie with Extinction Day.
Fantasy Map Simulator: Create and watch imaginary worlds evolve over centuries. Design maps, simulate nations and their politics, and control destinies. See empires rise and fall on your desktop wallpaper. A unique simulation for history buffs and creative minds.
- 3
After Inc: Revival
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Simulation with Extinction Day.
Can you rebuild civilisation after a zombie apocalypse? From the creator of Plague Inc. comes a unique blend of strategic simulation, survival city builder and ‘mini 4X’. Build settlements, harvest resources and shape society as you lead Humanity out of the darkness.
- 4
Terra Invicta
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Simulation with Extinction Day.
An alien invasion has fractured humanity into seven ideological factions each with a unique vision for the future. Lead your chosen faction to take control of Earth’s nations, expand across the Solar System, and battle enemy fleets in tactical combat.
- 5
Bio Inc. Redemption
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Indie with Extinction Day.
Bio Inc.: Redemption is a realistic simulation and strategy game in which you make life or death decisions. Create a deadly illness to infect and torment your victim or play as the head of a medical team and hopefully find a cure to save your human patient. Will you be the plague or preserve humanity?
- 6
Rebel Inc: Escalation
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Simulation with Extinction Day.
A unique and deeply engaging political/military strategic simulation from the creator of Plague Inc. Balance competing civilian and military priorities and deal with a deadly insurgency in order to stabilise a war-torn country.
- 7
Crusader Kings II
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Simulation with Extinction Day.
Explore one of the defining periods in world history in an experience crafted by the masters of Grand Strategy.
- 8
Victoria II
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy with Extinction Day.
Carefully guide your nation from the era of absolute monarchies in the early 19th century, through expansion and colonization, to finally become a truly great power by the dawn of the 20th century. Victoria II is a grand strategy game played during the colonial era of the 19th century, where the player takes control of a country, guiding...
- 9
Plague Inc: Evolved
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Indie with Extinction Day.
Plague Inc: Evolved is a unique mix of high strategy and terrifyingly realistic simulation. Your pathogen has just infected 'Patient Zero' - now you must bring about the end of human history by evolving a deadly, global Plague whilst adapting against everything humanity can do to defend itself.
- 10
Biosys Inc
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Indie and Simulation with Extinction Day.
Biosys Inc. is a biology simulator that takes you to a new planet where you will be responsible for the process of abiogenesis. Start with a single cell and watch your ecosystem thrive by itself. All cells carry DNA that will allow them to mutate and evolve into complex beings.
- 11
Bio Inc. Classic
Single-player alternative to Extinction Day — playable solo, no multiplayer required. Shares Strategy and Simulation with Extinction Day.
Relive the original Bio Inc. experience, rebuilt from the ground up for PC to celebrate its 15th anniversary. Develop deadly diseases, cripple your victim’s body, and determine their ultimate fate in this biomedical strategy simulator.