A archive file with the game can be downloaded in the following links:
Tag Tournament v.1.0
Tag Tournament v.2.0 (Released 26/11/2011)
Tag Tournament v.2.01 (Released 28/11/2011)
Tag Tournament v.2.1 (Released 07/12/2011)
Tag Tournament v.2.11 (Released 08/12/2011)
Tag Tournament v.2.12 (Released 14/12/2011)
Tag Tournament v.2.2 (Released 15/1/2012)
Tag Tournament v.2.21 (Released 16/1/2012)
Tag Tournament v.2.3 (Released 15/11/2012)
Tag Tournament v.2.3.1 (Released 09/07/2013)
Tag Tournament v.2.3.2 (Released 12/07/2013)
Unzip the file, and then start the game by double-clicking the TagTournament.exe file.
Tag Tournament requires two essential applications to be installed, namely:
.NET Framework 4
Microsoft XNA Framework Redistributable 4.0
If you run into trouble when trying to run the game, you're probably missing one of these installations.