Screen and audio recording app for Mac?

Hey,

Could anyone recommend a decent (and preferably not too expensive) application that’ll record what’s on my screen and also the audio generated from what’s currently running? I’ve tried using QuickTime that comes as standard on my Mac but that does video only.

I want to record some video of what I’m working on and be able to capture the in game audio (music and sound effects) as well as the gameplay.

Thanks,

Anthony