I started playing around with fire and came up with this, I’m sure it has been done before this way but I have never seen it anywhere.
FIRE!!!.blend (401 KB)
It doesn’t take too much memory, and creates a sort of liquidity to the fire so it can be “draped” over (or actually under) an object. Unfortunately due to it using a particle emitter it cannot, to date, be used in the game engine.