156 reviews
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ImproviSoft LLC

More from ImproviSoft LLC

Download size

3 MB

Content rating


Last updated



Works with

  • Windows Phone 8.1
  • Windows Phone 8
  • Windows Phone 7.5

App requires

  • photo, music, and video libraries
  • data services
  • movement and directional sensor
  • WVGA (480x800)
  • music library
  • media playback
  • web browser component
  • HD720P (720x1280)
  • WXGA (768x1280)
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Supported languages (2)

English English (United States)
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*** Our Invasion game for Windows Phone is Open-Source Freeware and does not show advertising - It's "Free" as in "Completely Free"!  Source code is available on - Please Rate & Review the game here & the Article there! - Thanks!  ***

It's a UFO Invasion!  Our world is under attack and you are Star Command's only hope.  The fate of our world depends on you!  

Blast the UFOs in each of the six Space Sectors and scavenge their destroyed alien ships for ammo, shields, and weapon upgrades (collect the falling power-ups) in order to stay alive as long as you can.  Be warned: each Wave of UFOs becomes more difficult to destroy!

Both kids & adults love playing Invasion, a 2.5D casual shooter game (not intended for hardcore gamers). Invasion is a perfect addition to your Windows Phone's Kids Corner!


The original 2002 Invasion game was written by Mauricio Ritter with DirectX 6 in C++ for Windows XP.  It was ported to Managed DirectX in 2003 by Steve Maier.  Windows Phone versions (2011 XNA, 2013 MonoGame) were ported by Dan Colasanti of ImproviSoft LLC.  Source code for all versions can be found at!


ImproviSoft intends to keep "Invasion for Windows Phone" free and open-source!  We plan to make improvements to Invasion in upcoming releases.  If you are a graphics designer or app developer and would like to contribute your time to this project, please contact us at  

Thanks for playing Invasion!

Release Notes:
Version 1.0:
* Original version for Windows Phone 7
Version 1.1:
* First version built with Visual Studio 2012 for Windows Phone 7.5/7.8
Version 1.8:
* Windows Phone 8 exclusive - 1st version built with MonoGame
Version 1.9:
* Fixed many bugs, made Wave 6 (red UFOs) more challenging, added UFO damage animations after wave 1
* 1.9.1 Bug fixes & Set game-speed according to difficulty level
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  • by User 11/19/2014
    Great funn
  • by vicky 11/19/2014
    Love it!
  • by Santiago 11/7/2014
    EXCELLENT !!!!
  • by Zuber 10/21/2014
    This is not that good its boring
  • by Delicious 10/13/2014
    No in app purchases or annoying advertisements AND the game works flawlessly? Take all my stars!
  • by Alysia 10/12/2014
    So fun!
  • by David 10/2/2014
  • by samuel 9/26/2014
  • by oscar 9/19/2014
    Great game
  • by johan 9/12/2014

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