I have seen some games ALT+Tab very effectively. StarTopia will ALT+Tab fine from the menus. When you return to the game, it spends a minute or two to re-initialise the graphics card for it's purpose. Being a very graphically intensive game (many modern computers still can't run it at it's highest quality!) it makes sure that it has what it needs set up accurately. The wait is a pain, but it's a lot less than the start-up load time, and it's reliable!
