# Rat Overpopulation > Rat population simulation game with customizable units and survival analysis. (iPhone/iPad app by Dana Steinke.) - Source: https://appshunter.io/ios/app/rat-overpopulation/id1546520992 (this page in markdown: same URL + `.md`) - Developer: [Dana Steinke](https://appshunter.io/developer/1546520994) - Category: Entertainment - Price: Free - Rating: 4.64/5 from 14 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 36 MB - Languages: English - Released: 2020-12-30 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/rat-overpopulation/id1546520992/reviews.md ## What is Rat Overpopulation? The user can choose the number of units and the number of rats. A unit is defined as one main room in the middle that consists of one food bowl and four water bottles, that is surrounded by 12 smaller rooms that serve as sleeping areas for the rats. The goal of the game is to have the mischief of rats survive for as long as possible. The user can specify the amount of units and rats to spawn. When the game starts, the user can individually drag the rats onto the maze, or drop all of them with a button. During the game time, the user can observe the rats, as well as drag and drop any of the rats in the maze. When all the rats are dead, the game ends, and a graph is shown of the total population compared to the number of rats that died over time. ## Key features - Customize unit and rat numbers - Drag and drop rats individually - Observe rat behavior - Survival time tracking - Population vs. death graph - Maze environment simulation ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/rat-overpopulation/id1546520992/reviews.md ### 4/5 — Eh… *2025-08-10* It’s cool watching the rats get stuck or find the food/water units ### 5/5 — rats exist *2021-09-06* this is incredibly realistic as rats exist in real life. i can only imagine what the creator of the simulation was thinking when they created it. i myself have seen rats in real life and can confirm that they exist. i once saw a rat in the side of the road it was eating the grass. i think this game could get better if there was a slider to choose how many rats and food things there are, with an advanced thing that lets you pick more. a joystick and zoom options would also be great to be able to see the rats easilyer. it would also be cool if each rat had a slightly diffrent color or pattern so you could kinda tell them apart. also zombie rats. this game could also have the feature of rat names. they could be named rat 00001 and rat 00002 to start but if you select one you could change it to a diffrent name and watch that rat as it moves around. my last suggestion is to add a controlled version where you control a rat and have to fight to not get thirsty or starve. this could allow me to see what it is like being a rat. i think zombie rats would be cool. ### 4/5 — Interesting concept game *2021-09-05* I like the funny idea of overpopulation. It will be better if there are more attractive graphics! ### 4/5 — 👍👍 *2021-09-04* The game is good and easy to play! The concept is also very interesting, perhaps you could try making the text larger for better readability. ### 5/5 — It’s relaxing watching them. *2021-09-02* The soft grey and pink colors of the rats on the white maze offers calming and relaxing mood. I found myself being attracted by the unique path of each of the individual rats in their busy daily lives. 👍 ### 4/5 — very unique game *2021-09-02* This is a very unique game. It is good eduction tool for students simulation the case of overpopulation. Fun to play too ### 5/5 — Mesmerizing *2021-08-12* It’s fun to watch the rat colony grow and shrink in population. I find myself rooting for their success. And the latest update has more interactivity. ### 5/5 — OMG these rats are Cute! *2021-01-01* The rats are so cute! A lot of fun to see them running around and looking for food! It will be better if it can show individual rat status and support phone UI. ## Frequently asked questions about Rat Overpopulation ### What is Rat Overpopulation? Rat Overpopulation is a simulation game where you manage a rat population within a customizable maze. The goal is to keep your rats alive for as long as possible and observe their population dynamics. ### How do I control the rats in Rat Overpopulation? You can individually drag and drop rats onto the maze or use a button to drop all of them at the start. During gameplay, you can continue to drag and drop any of the rats. ### What happens when all the rats die in Rat Overpopulation? When all the rats have died, the game ends. A graph is then displayed showing the total population compared to the number of rats that died over time. ### Can I customize the game environment in Rat Overpopulation? Yes, you can specify the amount of units and rats to spawn. A unit consists of a main room with a food bowl and water bottles, surrounded by sleeping areas. ### Is Rat Overpopulation free to play? Yes, Rat Overpopulation is available for free on supported devices. ### What devices does Rat Overpopulation support? Rat Overpopulation is available on iPhone, iPad, and iPod. ### How often is Rat Overpopulation updated? The latest version, 1.1.1, was released on July 16, 2021. The app was initially released on December 30, 2020. ### What is the age rating for Rat Overpopulation? Rat Overpopulation has an age rating of 4+, making it suitable for younger players. ## Version history (last 3 releases) ### 1.1.1 — 2021-07-16 - Added food bowl and water bottle refilling - Added Play and Fight state for the rats - Added Mate system - Added aging system - Added status symbols - Updated menu graphics - Added ability to remove dead rats ### 1.1.0 — 2021-01-06 - Added the thirst feature for the rats so they can rehydrate at water bottles - Adjusted the UI design dynamically so it functions on multiple devices of different resolutions ### 1.0 — 2020-12-30 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*