Comparison

Zombie Outbreak Simulator vs Overrun

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

Overrun

Lead a group of survivors in a post-apocalyptic world, building defenses and managing your team to fight off waves of attacking zombies. Collect loot, upgrade structures, and acquire powerful weapons to survive the undead horde.

Highlights
  • Wave-based zombie combat
  • Base building and defense upgrades
  • Item and weapon collection
  • Survivor team management
  • Survivor leveling and upgrades
  • Mid-wave item usage
Features
Read full description

Overrun is zombie base defense with a gun in your hand. Put up turrets and barricades, recruit survivors, then take direct control of one and shoot the horde yourself with twin-stick controls. It plays fully offline, so you never need a connection to play. Every zombie you kill earns Z-Bucks, which you spend on upgrades between waves. There are dozens of waves, and each one pushes harder than the one before. The maps include the suburbs, a hospital and a power plant, each with its own layout and tougher enemies, so a tower defense plan that worked in the suburbs needs rethinking at the power plant. Zombie base defense starts with the base: the turrets, barricades and defensive structures you place and upgrade. Your survivors carry rocket launchers, .50 cal rifles, grenades and Molotovs, and they level up as they fight. In the middle of a wave you can call in special strikes, drop first-aid kits and pick up power-ups. This is tower defense and twin-stick shooting in one game, and both work offline. Leaderboards and achievements run through Game Center, cloud saves keep your progress safe between devices, and there are daily rewards to collect. Overrun is free to play, with optional in-app purchases.

Screenshots

Zombie Outbreak Simulator4 screens
Overrun4 screens

Verdict

The call

The clearest difference is rating: Overrun at 4.6 against Zombie Outbreak Simulator's 4.1. Overrun also leads on update cadence (every 5 days vs every 3 months) and ratings volume (13K vs 1.7K). Zombie Outbreak Simulator's advantage is iOS requirement (12.0 vs 15.0). On price, review sentiment, 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 Overrun sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Overrun holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: Overrun has 13K ratings behind it against 1.7K, 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 76% of Overrun's.

UpkeepUpdate frequency

Zombie Outbreak Simulator ships an update every 3 months, Overrun every 5 days. Both last shipped on November 6, 2026.

Scorecard4 real differences · 6 level
Zombie Outbreak Simulator versus Overrun: the parameters behind the verdict, then further details
ParameterZombie Outbreak SimulatorOverrun
PriceFreeFree
Rating4.1 (1.7K ratings)4.6 (13K ratings) — better
Positive reviews69.1% of reviews76.1% of reviews — better
Number of ratings1.7K13K — better
Update frequencyEvery 3 monthsEvery 5 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size103 MB484 MB
Age rating12+12+
DeveloperBinary Space Pty LtdWildfire Games Ltd

Customer experience

Zombie Outbreak Simulator

All ratings1,699 ratings
Positive78.1%
Neutral6.6%
Negative15.3%
Written reviews372 reviews
Positive69.1%
Neutral10.8%
Negative20.2%

Overrun

All ratings12,620 ratings
Positive90.0%
Neutral7.1%
Negative2.8%
Written reviews352 reviews
Positive76.1%
Neutral8.8%
Negative15.1%

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

Overrun

From 13K App Store ratings

What we love

  • 🚀 Fast-paced gameplay
  • 👍 Fun and creative concept
  • 🕹️ Engaging tower defense mechanics
  • 💰 Decent in-game rewards

Room to improve

  • 🐛 Frequent crashes and bugs
  • 🔋 High battery consumption
  • 🤖 Unbalanced difficulty progression
  • 🔍 Limited camera controls

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

Overrun

Reported bugs

4 issues
  • Survivors randomly dying during build phase
  • Survivors getting stuck or behaving erratically
  • Endless loading screen and save data loss issues
  • Graphical glitches and visual bugs

Requested features

4 requests
  • Sandbox/custom game mode
  • More varied map/level designs
  • Improved survivor management
  • Ability to upgrade/enhance defenses

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
9 purchases

Overrun

One-time9
  • 1000 Z Bucks$1.99
  • Power Up Item Pack$1.99
  • Starter Pack$1.99
Show 6 more
  • 5000 Z Bucks$2.99
  • Remove Ads$2.99
  • Unlock Everything$2.99
  • Explosive Item Pack$2.99
  • Flaming Item Pack$2.99
  • 10000 Z Bucks$3.99

Questions

Is Zombie Outbreak Simulator free?
Zombie Outbreak Simulator is free to download, with in-app purchases available.
Is Overrun free?
Overrun is free to download, with in-app purchases available.
Which has better reviews, Zombie Outbreak Simulator or Overrun?
Overrun is rated higher. Zombie Outbreak Simulator averages 4.1 out of 5 from 1.7K ratings, while Overrun averages 4.6 from 13K ratings.
Do Zombie Outbreak Simulator or Overrun have ads?
Both Zombie Outbreak Simulator and Overrun show ads.
Which is updated more often, Zombie Outbreak Simulator or Overrun?
Zombie Outbreak Simulator ships an update every 3 months, and Overrun every 5 days. Most recently, Zombie Outbreak Simulator was updated on November 6, 2026 and Overrun on November 6, 2026.

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