CPU: Athlon 64 3000+/Intel 2.8GHz
Graphics: NVIDIA 6600/X800GTO (SM 2.0)
RAM: 768MB[xp]/1GB[vista];
HDD: 6GB;
Internet: 256k+;
Optical Drive: DVD;
Software: DX9.0c with Windows XP
For Crysis.
I haven't really seen that much of it. The only reason IMO that 3 failed is because it was never released for the PC, and 1 & 2 were PC games. 4 sold well, but it was a completely different game from the first 3.