You could have downloaded Quadratis 1.1 from our software library for free. Our antivirus check shows that this download is clean. This free program is a product of Chris Hollman. Quadratis.exe is the default file name to indicate this program's installer. The software is included in Games. This PC program can be installed on 32-bit versions of Windows Vista/7/8. The most popular version of the Quadratis 1.1.
From the developer:
Quadratis is a Direct3D implementation of the classic Tetris game. It emphasizes strategy through the use of a bonus system. Bonuses are given for accomplishments during the game and for the options you chose at the beginning which make the game harder.
You may want to check out more software, such as Concave Mirror, RhymeTime1 or RhymeTime2, which might be related to Quadratis.