You can use crease in a first pass, and if you need solid lines, using the pinch tool willl be better (just try it ) !
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Details need to be precise when the camera is near, and when it's realistic models.My game will be cartoon abstract !
No normal map on game :
1 ) sculptris to make the 3D model intuitively (no detail sculpt)
2 ) retopology
3) perhaps bake normal map ??
4) paint the character and add all details on texture
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Some examples of what i would want :
(The good looking don't comes from some normal map , but from very good design
)
another good example i would like to make as good :
