
Under Domain - Alien Invasion Simulator
Under Domain - Alien Invasion Simulator will surprise you with a Sci-fi turn-based game completely different from others. How about turning yourself into an Alien and planning an invasion to Planet Earth? You can secretly influence human history and build war machines to exterminate human beings.
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Transform yourself into the Reptilian leader that will lead your species to victory! Secretly influence human evolution by sabotaging their technologies, sending hybrids agents, executing operations of murder, mind-control, abductions, and virus contamination. Meanwhile, you build a powerful war fleet to attack at the right moment.
Under Domain accompanies human history from the 1900s until the year of 2020. The player has 10 movements each turn, and each movement represents one year of human existence, completing one decade at the end of each turn. Your actions must be accurate to avoid drawing the attention of humans. After all, possible alien spaceship sightings could reveal your existence to human Nations, and they can get ready to attack you first, increasing the difficulty level of the invasion phase.

The game offers you simple ways of planning and executing the invasion, though with highly strategic combinations of actions that can lead you to different possible winning scenarios. Under Domain is a strategy game easy to learn but hard to master completely.

Explore the energy coming from pyramids, seek rare volcanic minerals to build your war machines, and launch orbital and surface probes to capture and interfere in human history's relevant facts.

Evolve your mothership and get access to new resources and instruments to raise your war power. Choose from 3 evolution pillars in each decision: Science, Military, or Infrastructure.

Replace key people on Earth's evolution. You have to choose wisely which specialists will be able to sabotage human war power.

Search, build, and enhance your spaceships. Spread them around Planet Earth, so in the moment of invasion, all of them rise in different locations to combat phase.
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Game details
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Under Domain - Alien Invasion Simulator price history
Lowest tracked price: £4.79 (Jul 7, 2026) · current best: £4.79.
Under Domain - Alien Invasion Simulator player count & reviews
44% positive reviews all-time · 0 peak players in the last 30 days.
Under Domain - Alien Invasion Simulator — frequently asked questions
Where can I buy Under Domain - Alien Invasion Simulator at the cheapest price?
Right now the cheapest offer for Under Domain - Alien Invasion Simulator is £4.79 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
What is the lowest price Under Domain - Alien Invasion Simulator has ever been?
The lowest price KingsPrice has tracked for Under Domain - Alien Invasion Simulator is £4.79 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
How many people play Under Domain - Alien Invasion Simulator?
Under Domain - Alien Invasion Simulator peaked at 0 concurrent players on Steam in the last 30 days (highest on Jul 7, 2026). The player chart on this page updates daily.
How can I get Under Domain - Alien Invasion Simulator at a discount?
Create a free price alert on this page and KingsPrice will email you when Under Domain - Alien Invasion Simulator drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
System requirements
Minimum
- OS *: Windows 7 (SP1+)
- Processor: Core i3
- Memory: 4 GB RAM
- Graphics: IGP
- DirectX: Version 11
- Storage: 4 GB available space
Recommended
- OS: Windows 10
- Processor: Core i5
- Memory: 8 GB RAM
- Graphics: GTX 1050
- DirectX: Version 11
- Storage: 4 GB available space











