In order to play Portal: Prelude you need to have Steam/Portal installed on your system. Portal: Prelude is an unofficial prequel for Valve's hit title Portal. Its story revolves around the pre-GlaDOS epoch, even before she was plugged in. At this
This was a small video showing the process of building the main background menu map for Chell's Legend. You might need to dl an Xvid Codec to watch this video.
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