As Sjaak said, if you want your LEDs to change color or either be on or off for certain games, you'll need an LED controller like the PAC-Drive, PACLED64, or LED-Wiz (and software like LEDBlinky). If you just want your LEDs to be always on, you can wire them directly to your PC power supply using the appropriate resistors (if not included in the LED assemblies you purchase) and voltages. As far as what type to use, that's up to you, there are a ton of options out there.