Tag of Joy
Based in Vilnius, Lithuania

Release date:
27 October, 2014 (Windows Phone)
24 May, 2017 (iOS)
June, 2017 (Android)

Windows / Windows Phone
iPhone / iPad


Regular Price:

FREE (with IAPs)


Outstanding monster fights with a twist on reality! Monster Buster is the first monster fighting and collecting game that takes you outdoors. Explore your city and find rare monsters from parallel universes invading our world. Detect, engage, fight and capture – then head out to your next big adventure. The thrill of the chase is on!


The "Monster Buster" game idea was born from a desire to extend a monster fighting experience and merge it with the real world by using Tag of Joy's previous experience in using augmented reality. The first prototype was built in a hackaton over the weekend in 2012 and was later accepted to a Microsoft and Nokia accelerator and funding program AppCampus.fi. The early beta version (similar in features to Pokemon Go when it was launched) was released in October 2014 on Windows Phone and it was the first monster fighting and collecting game that takes players outdoors. It was featured on numerous Windows Phone related websites, has great player feedback, and a hugely extended version was released in 2017.


  • Discover and collect tons of incredible monsters hidden around in your city.
  • Find monsters in your environment using the camera of your smartphone.
  • Fight in dynamic fights using unique skills of your monsters.
  • Gain experience and grow your monsters to pursue even bigger challenges.
  • Original handcrafted 3D monsters.


Trailer YouTube




Awards & Recognition

  • "Best Indie Game" – GameOn 2016
  • "Selected Game" – CasualConnect Berlin 2017
  • "Winner" – Microsoft App Star
  • "Finalist" – European AppCup 2015
  • "Selected game" – AppCampus.fi
  • "One of the Best Apps" – App Camp 2012
  • "1st Place" – Startup Weekend Lithuania 2012
  • "Best Tech Startup" – bzn start awards 2013
  • "Best Funded Startup" – bzn start awards 2014

Selected Articles

  • "Monster Buster is a fun game to play and having to move around your community to find new and rare monsters to battle adds a bit of appeal to the game."
    - George Ponder, Windows Central
  • "Step out into the real world with Monster Buster: World Invasion"
    - developer.microsoft.com, Windows Dev Center

About Tag of Joy

We are Tag of Joy – an award winning, creativity-powered company focused on game development for all major mobile platforms (iPhone, Android, Windows Phone) and desktops (OS X, Windows). We also used to make rich and compelling interactive visualizations, graphical applications, augmented reality solutions and other gamified products for various purposes. In addition to that, we are active people, involved in the local game development community. We organized Game Jam 2012, 2013 and 2014 in Vilnius and we also teach Game Development courses at the largest university of Lithuania.

More information
More information on Tag of Joy, our logo & relevant media are available here.

Monster Buster: World Invasion Credits

Šarūnas Ledas
Business & Development

Žilvinas Ledas
Business & Development

Gediminas Tarasevičius
Game Design

Modestas Rimkus
2D Art

Julius Liubertas
3D Art

Zorian Ivanec

Egidijus Čilčius
Music and Audio

presskit() by Rami Ismail (Vlambeer) - also thanks to these fine folks