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4 Player Reactor

by cool cherry trees
Platform: Android Rated: All Ages
3.9 out of 5 stars  See all reviews (117 customer reviews)

Price: $2.99
Sold by: Amazon Digital Services, Inc.
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Try this app right now on your computer. You control the app with your mouse and keyboard to experience it like you would on your phone. Test drive this app before you buy.
How does this work?
Clicking the “Test drive now” button launches a copy of this app on Amazon Elastic Compute Cloud (EC2), a web service that provides on-demand compute capacity in the cloud for developers. When you interact with the simulated phone using your mouse and keyboard, we send those inputs over the Internet to the app running on Amazon EC2 — just like your mobile device would send a finger tap to the app. Our servers then send the video and audio output from the app back to your computer. All this happens in real time, allowing you to explore the features of the app as if it were running on your mobile device.

Test Drive Troubleshooting

Follow the steps below to Test Drive this app in Chrome. These steps will disable the version of Flash included with Chrome and run Test Drive in a separate version of Flash.

In Chrome type about:plugins in the address bar and press Enter.
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Click on Details on the right-hand side of the page.
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Click on Disable under the first listing of Flash. Leave the other version enabled.
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Latest Updates

What's new in version 1.94
  • Bug-fixes for Jelly Bean devices
  • Language fixes for Czech
  • New language: Swedish
  • New Mode: Fitting ball

Product Details

  • ASIN: B004S7RBSK
  • Release Date: March 25, 2011
  • Rated: All Ages This app may include dynamic content. What's this?
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (117 customer reviews)
  • Amazon Best Sellers Rank: #9,763 Paid in Appstore for Android (See Top 100 Paid in Appstore for Android)
  •  Would you like to give feedback on images?.

Product Features

  • Amuse yourself with this clean, fast, and educational reaction game for up to four players
  • Experience 26 different game modes, with varying difficulty levels
  • Customize your playing experience with adaptive modes and variable game lengths
  • Play fair; multiple difficulty settings give kids, novices, gaming geeks, and everyone else equal chances
  • Practice to improve your hand-eye coordination

Product Description

4 Player Reactor is an entertaining, multi-player, split-screen game. This simple puzzle game supports 2 - 4 players so it makes for a great party game. Or, hone your skills using single-player practice games.

The premise of the game is simple: solve a puzzle and be the fastest person to tap in. Puzzles range from identifying shapes or colors to easy math equations. Each player gets an assigned tap area and must focus on the center of the screen. Have the quickest reaction time when the correct solution is visible!


The app includes 26 different puzzle modes and is a cinch to customize. Like or dislike a particular puzzle? Enable or disable it in the custom menu. Choose from 4 different difficulty levels: easy, medium, hard, and insane. Select how many correct hits should happen before the puzzle mode changes. You can also opt to play the games in a random order or play modes that are easier to win more often. A clever Adaptive Mode makes it harder to hit the button for a player that's far ahead in points. The required number of points per round can be set from 1 to one million.

4 in a row
React when there are 4 connecting dots
Game Modes
  • White screen - React when display is white
  • Color names - React when the color of the text matches the word
  • 3 items - React when there are 3 like items
  • Equations - React when the equation matches the answer
  • 5 different - React when there are 5 different items
  • Mouse cheese - React when the mouse can get to the cheese
  • World's capitals - React when the capital matches the country
  • Word's flags - React when country name matches the flag
  • Countdown - React when countdown has reached 0
  • Find circle - React when you see the circle among the squares
  • Sad smiley - React when the display shows a frowning smiley
  • Count shapes - React when the equation matches the number of that shape
  • Illusion: arrow - React when the arrows have the same length
  • Colliding shapes - React when the colored shapes collide
  • Illusion: T - React when the lines on the T are the same length
  • Illusion: tracks - React when the bars on the tracks have the same length
  • Pairs - React when there are 2 shapes of the same kind
  • Population - React when the equation correctly depicts the country with the greater population
  • Area - React when the equation correctly depicts the country with a greater land area
  • 4 wins - React when there are 4 connecting dots
  • ABC - React when the letters of the alphabet are in the right order
  • Tic-Tac-Toe - React when there are three Xs or Os in a row
  • Positive vs Negative
  • Silhouettes: Is there an animal?
  • Silhouettes: Can it fly?
  • Silhouettes: Is it man-made?

Technical Details

  • Size: 1.6MB
  • Version: 1.94
  • Developed By: cool cherry trees
  • Application Permissions: (Help me understand what permissions mean)
    • Open network sockets
    • PowerManager WakeLocks to keep processor from sleeping or screen from dimming
  • Minimum Operating System: Android 1.5
  • Approximate Download Time: Less than 30 seconds

Customer Reviews

Most Helpful Customer Reviews
7 of 8 people found the following review helpful
5.0 out of 5 stars Great concept, great execution May 6, 2011
Verified Purchase
Fun little game with all sorts of puzzle types. Smooth design, fluid control, simple premise, challenging fast-action puzzles. NOTE: For anyone experiencing the frequent pause issue with multiplayer; there's an option in the settings at the bottom that says it adds difficulty to players who have a decent lead by affecting their buzzer. If you disable this, the pause issue should be fixed.
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6 of 8 people found the following review helpful
4.0 out of 5 stars Better than I thought! May 6, 2011
Verified Purchase
Honestly, wasn't sure what to expect with this one. And this is definitely the only game where you can comfortably have 4 people on one phone. So by that merit alone, it's awesome. It's simple, don't expect to get blown away by graphics or anything like that, not that I think you would. And really not sure if i'd ever pull this out at a party lol. You can play 1 player, but that's pretty boring, so really if you don't have some people to play with, it's probably not worth the purchase. 2 player + though, and it's a solid experience, one where the novelty wouln't really wear off. You can definitely kill a lot of time with this one.

Phone: Droid X(Android 2.2.1, Liberty 2.0.1)
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1 of 1 people found the following review helpful
4.0 out of 5 stars Great Group Game May 25, 2011
Verified Purchase
Enjoyed it playing with a few friends at a pub. Quick, simple, even more fun with 4 people though for sure.
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1 of 1 people found the following review helpful
4.0 out of 5 stars Great little app. Love the customization. May 25, 2011
By Melissa
Verified Purchase
My son really loves thia game. It is fun because we both can play. And the customization feature allows me to take off the subjects that are too hard for him.
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1 of 1 people found the following review helpful
3.0 out of 5 stars Great Game, Has some faults May 6, 2011
By Scott
Verified Purchase
The game is amazing, but there are a few things that need to be fixed by the developer.
For reference, my system is an Android 3.01 Xoom

1. The adaptive button does not work, and only pauses the game.
2. The game crashed whenever I got to the "pairs" minigame, Disabling it via Custom Game made the game work again.
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1 of 1 people found the following review helpful
5.0 out of 5 stars Fun May 6, 2011
Verified Purchase
love this game. perfect when you want to test the reactions between you and your friends. varied gameplay that also taps into your wits and knowledge
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1 of 1 people found the following review helpful
This game is an absolute blast, you won't regret it. It's so much fun to play at restaurants while you're waiting for your food. One round fits into that time frame almost perfectly and you can have 4 people simultaneously playing on one device! Not many Android games can do that!

For more of my game/app reviews and the full review for 4 Player Reactor, look! me up at, I always do an extensive review of the free app of the day!
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1 of 1 people found the following review helpful
5.0 out of 5 stars So much fun April 2, 2011
Best local Multiplayer app on the droid. Worth the cost. It features a number of educational and reactive minigames that from geography to mazes and illusions
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Most Recent Customer Reviews
5.0 out of 5 stars cool
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Published 10 months ago by dandan
5.0 out of 5 stars Great fun
Game is much Fun and I have been playing it in both 2 and 4 player modes. It is fast, funny and you can actually learn something to. Read more
Published 16 months ago by Radivoj Djokic
5.0 out of 5 stars Perfect
I've had lots of fun with this game and it has great mini games and options. It has great customization along with it too
Published 17 months ago by Kindle Customer
1.0 out of 5 stars Could be better
It's a decent idea... not that great of a game.
It needs a lot of work, and the games are fairly predictable
Published 18 months ago by MKropp
1.0 out of 5 stars Got it and then never use it.
I got this one as a free app of the day and after playing it a couple times I found it was boring. Save your time and money.
Published 20 months ago by Kristopher D. Michaels
5.0 out of 5 stars So fun
This is so fun! Especially perfect for those competitive people out there! Super cool that there are a bunch of different types of competitions to play.
Published 20 months ago by pepperbook
5.0 out of 5 stars This is so fun!
This game is really fun. My kids love to play it too. Even my 6 year old get all excited because she was quicker than mommy to answer the questions. Read more
Published 21 months ago by Shannon Carr
4.0 out of 5 stars Fast- fun-challenging
Downloaded for kindle fire. My son (age 15) and I play this to pass the time. a variety of games that are very fast paced and randomized. Read more
Published 22 months ago by H. Shinn
4.0 out of 5 stars Just for Fun
Good concept. Play this every now and then with my gf while we're on the train to pass some time. Just for fun nothing more nothing less.
Published 22 months ago by MP24
5.0 out of 5 stars awesome
at my track meet we would all sit around my kindle and play the game until It was our turn to rungs
Published 22 months ago by leah anderson
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