NOTE: Sadly, this game is thoroughly UNSTABLE. It works perfectly on some systems, but exhibits very annoying behaviour on others, including destroying its own save files. Please be aware of this if you choose to download.
The painful story of how Phenomenon 32 came to be can be read here.
The installer is 239MB and, like most installers, requires administrator privileges to run. (If you have multiple users on your system, that is.) It may be wise to install it outside of Program Files; on some systems, if the game is installed there it always crashes the first time you start it (and works fine the second).
Here is a list of things to know before you download the game. This may help avoid misunderstandings about the nature of the game.
It can currently be download from the following hosts: