[s_henry_paulson]

If you're hung up on the money, VirtualBox should do what you need, it has a seamless mode, and it's free.

[carlesfe]

Talking from experience, VirtualBox doesn't play well with Steam games (or games in general).

For me, Terraria was buggy and the graphics had some glitches. Half-Life had mouse issues, etc.

I used to buy Parallels but they use the same update tactics than VMWare, so now I just don't use Windows games at all.