Personal Razor does packing and unpacking stdin stdout without temps
if you want to pack small games with razor then i suggest you use lolz, generally lolz does pack better than razor on game files.
let me say a few words about lolz and why its superior to gaming.
lolz: it's a combination of lzma + rzm entropy coder with elements of -cm aka content modeling.
as it processes data down the line it uses complex modeling on some predefined textures data. and this makes it ideal for games it gives around 3% ~ 5% better ratio than pure Razor.