Re: Half life 2: Episode 1
Generally when you install one source game (such as say.. cs source and not hl2) it downloads a few GCF files known as source sounds, models, etc... so if you downloaded episode one but not hl2, i'm sure you'd have a pertty big download, whereas if you downloaded hl2 afterwards, it would be a much smaller download. Valve doesn't just have the same crap copied all over the place. However, you could end up with some half-life2 content even if it's not installed, just by having say.. cs source installed. *shrugs*.