Tanarus
Ok this game does not alow minimizing, but i hacked it a couple years ago with a hex editor but now i cant seem to get it to work.. i would be willing to pay for some help.. but my guess there is no one skilled enough.. the game is not free but i will provide the money when needed.
press alt+tab and it should mimize
If it is the same game I am thinking of, you can't alt+tab because it will disconnect you.
It's the same engine as Infant-Free was. =\