Comparison

Zombie Outbreak Simulator vs Invaders Inc.

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Zombie Outbreak Simulator

Simulate and customize zombie outbreaks in real-world locations using Google Maps. Control outbreak parameters, observe chaos unfold, and even join the fight with military interventions. Explore thousands of player-created maps or offline options.

Highlights
  • Real-world map simulation with Google Maps integration
  • Customizable outbreak parameters (zombie speed, civilian numbers, etc.)
  • Observe infection spread from satellite to street view
  • Direct intervention with bombs, soldiers, and helicopters
  • Thousands of player-created maps
  • Offline map play
Features
Read full description

Zombie Outbreak Simulator is a sandbox app where you can customize your own zombie outbreak. Choose from thousands of real locations around the world on Google Maps! ◆ Over 3 million downloads! ◆ • "a killer timewaster" - Gizmodo • "zombies plus Google Maps equals fun" - Games Radar • "a splendid idea, no matter how omnipresent zombies may be" - Rock, Paper, Shotgun • Apple Staff Favorite in the US, Canada, Brazil, Mexico, Spain and 14 other countries! • Top 5 in Simulation and Strategy on the iPad! Watch a zombie outbreak unfold in real world environments, and alter the outbreak parameters to your liking. Do you prefer old-school slow movers, or the new fast movers? Is the population armed? How well can they shoot? How many police will be on patrol? Customize your own outbreak then watch the chaos unfold. Zoom in and out to keep track of the infection as it spreads across the map! Watch from a high satellite view to get an overview of the infection, or zoom right in and watch as civilians run for their lives, shoot at zombies and inevitably become infected. Keep track of the people's only hope - local law enforcement, as they fight back against overwhelming odds. Join in the action by raining fire from above with Mk81 and Mk82 bombs, delivered by A-10 Tank Killers! Parachute soldiers into the front lines to protect the civilians. Deploy helicopters to rescue civilians before they become overwhelmed. From the Settings screen you can change the following parameters: • Civilian numbers • Civilian armed % • Civilian accuracy • Initial zombie numbers • Zombie outbreak direction (N, E, S, W, Map Wide) • Zombie speed • Infection time (how long it takes for infected civs to turn into zombies) • Number of police • Police accuracy • Soldier accuracy From the Map Select screen you can choose from: • 15 featured online maps, using Google Maps • 5 offline maps (play anywhere even without an Internet connection) • Over 2,500 player maps using Google Maps, created by players of the game at www.class3outbreak.com This free version of the app contains limited features, with in-app purchases for upgrades to unlock the full functionality. Initially you have access to two maps (one online, one offline), limited outbreak settings, and limited numbers of bombs, soldiers and helicopters.

About

Invaders Inc.

Lead an alien invasion in this fast-paced strategy game. Choose from various alien races, harvest resources, and upgrade your forces to conquer Earth. Experience challenging gameplay with multiple difficulty levels.

Highlights
  • Lead alien invasion
  • Choose from three alien races
  • Harvest and upgrade resources
  • Evolve alien species
  • Upgrade spaceships
  • Produce weapons of war
Features
Read full description

Invaders Inc. is a fun and fast-paced strategy game where you take control of an alien invasion against planet Earth. Lead your invaders to victory and wipe out the human race! Invaders Inc. is an exciting new twist on the popular 'Pandemic' / 'Plague' type strategy game. Choose from 'real' alien races commonly believed to visit earth - including Greys, Reptilians and Insectoids. Each race has their own strengths and weaknesses making for challenging gameplay. Conquer the globe to unlock new alien races. Harvest natural resources from the Earth and use them to upgrade your spaceships, evolve your aliens and produce weapons of war. FEATURES: - Three levels of difficulty: Easy, Normal and Hard. - Three alien races: Greys, Reptilians and Insectoids. - Evolve your aliens to increase their chances of success. - Upgrade your spaceships ready for battle. - Produce weapons of war to give you an advantage over the earthlings.

Screenshots

Zombie Outbreak Simulator4 screens
Invaders Inc.4 screens

Verdict

The call

The clearest difference is rating: Zombie Outbreak Simulator at 4.1 against Invaders Inc.'s 3.3. Zombie Outbreak Simulator also leads on review sentiment (69% vs 50%) and ratings volume (1.7K vs 132). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Zombie Outbreak Simulator sells 10 one-off in-app purchases and Invaders Inc. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Zombie Outbreak Simulator holds the better App Store score, 4.1 against 3.3. That said, the two scores are not equally well evidenced: Zombie Outbreak Simulator has 1.7K ratings behind it against 132, so its average is the more settled of the two. Written reviews point the same way: 69% of Zombie Outbreak Simulator's written reviews are positive against 50% of Invaders Inc.'s.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
Zombie Outbreak Simulator versus Invaders Inc.: the parameters behind the verdict, then further details
ParameterZombie Outbreak SimulatorInvaders Inc.
PriceFreeFree
Rating4.1 (1.7K ratings) — better3.3 (132 ratings)
Positive reviews69.3% of reviews — better50.0% of reviews
Number of ratings1.7K — better132
Update frequencyEvery 3 monthsEvery 3 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better12.1
Further details — not scored
Size103 MB27 MB
Age rating12+9+
DeveloperBinary Space Pty LtdPHB Media Ltd

Customer experience

Zombie Outbreak Simulator

All ratings1,699 ratings
Positive78.1%
Neutral6.6%
Negative15.3%
Written reviews368 reviews
Positive69.3%
Neutral10.6%
Negative20.1%

Invaders Inc.

All ratings132 ratings
Positive55.3%
Neutral6.8%
Negative37.9%
Written reviews96 reviews
Positive50.0%
Neutral15.6%
Negative34.4%

User reviews

Zombie Outbreak Simulator

From 1.7K App Store ratings

What we love

  • 🚀 Great simulator
  • 🚀 Immersive gameplay
  • 👍 Beautiful graphics
  • 👍 Addictive and fun

Room to improve

  • 💰 Pay-to-play model
  • 🐛 Bugs and glitches
  • 🐛 AI issues
  • 🔒 Limited free content

Invaders Inc.

From 132 App Store ratings

What we love

  • 🎮 Fun and addictive strategy gameplay
  • 💰 Free-to-play model
  • 👽 Unique alien invasion theme
  • 🧠 Simple yet strategic mechanics
  • ⚙️ Multiple difficulty levels

Room to improve

  • 📺 Excessive and intrusive ads
  • ⏸️ Forced ads even to quit the game
  • 🐢 Slow progression and point accumulation
  • 😴 Limited content and gets boring quickly
  • 📋 Limited to only three alien races

Bugs and requests

Zombie Outbreak Simulator

Reported bugs

4 issues
  • Civilians getting stuck in buildings
  • Online and player-created maps not working
  • Issues with watching ads for in-game rewards
  • Restore purchases not working after reinstallation

Requested features

8 requests
  • Add more military units (tanks, helicopters, etc.)
  • Implement a sandbox mode with more customization
  • Improve zombie and civilian AI
  • Add more maps and locations
  • Introduce different zombie types and mutations
Show 3 more
  • Allow players to control individual units
  • Implement a base-building or fortification system
  • Add a wave-based survival mode

Invaders Inc.

Reported bugs

8 issues
  • Game crashes after selecting difficulty
  • White screen glitches after ads
  • Unclosable ads preventing gameplay
  • Ads bypass ad blockers
  • Button malfunctions and unresponsive taps
Show 3 more
  • Typos in game text (e.g., 'evergy' instead of 'energy')
  • Gray screen preventing gameplay
  • Ads consume excessive data

Requested features

12 requests
  • Add more alien races
  • Implement pause and speed controls
  • Add visual effects and animations
  • Include more detailed country-level maps
  • Add online multiplayer mode
Show 7 more
  • Implement news/event system during gameplay
  • Add UI theme personalization and color options
  • Include more languages (Spanish, Russian, Portuguese, German)
  • Add ground forces and combat mechanics
  • Increase point earning rate
  • Add more scenarios and campaigns
  • Include Half-Life alien races

In-app purchases

10 purchases

Zombie Outbreak Simulator

One-time10
  • Unlock Offline & Online Maps$0.99
  • Unlock Outbreak Settings$0.99
  • Unlimited Soldiers$0.99
Show 7 more
  • Unlimited Mk81 Bombs$0.99
  • Unlimited Mk82 Bombs$0.99
  • Unlimited Helicopters$0.99
  • Unlock Player Maps - Americas$1.99
  • Unlimited Bombs, Soldiers & Helicopters$2.99
  • Unlock All Player Maps$2.99
  • Unlock Everything$4.99
1 purchases

Invaders Inc.

One-time1
  • Upgrade Pack$2.99

Questions

Is Zombie Outbreak Simulator free?
Zombie Outbreak Simulator is free to download, with in-app purchases available.
Is Invaders Inc. free?
Invaders Inc. is free to download, with in-app purchases available.
Which has better reviews, Zombie Outbreak Simulator or Invaders Inc.?
Zombie Outbreak Simulator is rated higher. Zombie Outbreak Simulator averages 4.1 out of 5 from 1.7K ratings, while Invaders Inc. averages 3.3 from 132 ratings.
Do Zombie Outbreak Simulator or Invaders Inc. have ads?
Both Zombie Outbreak Simulator and Invaders Inc. show ads.
Which is updated more often, Zombie Outbreak Simulator or Invaders Inc.?
Zombie Outbreak Simulator ships an update every 3 months, and Invaders Inc. every 3 months. Most recently, Zombie Outbreak Simulator was updated on October 17, 2026 and Invaders Inc. on October 8, 2026.

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