MovieClip

SimpleButton

Use MovieClip instead.

Graphic

Use MovieClip or can be cached to bitmaps.

Timeline

Motion tweens & basic bitmap based shape tween.

Blendmodes

Supported blend modes

TextFields

htmlText is not fully supported.

Fonts

Filters

Filters can be pre-rendered

Actionscript

Write code in Unity using the powerful API modelled on the Flash® runtime. Basic uniSWF AS3 Api available here

Vector Rendering

Automatically converted to bitmaps.

Sound

Use frame triggers to trigger unity audio addFrameScript

Masks

Use clipRect as a possible alternative.

FLV/Video

Use the unity MovieTexture with drawRectUV.

RSL

Assets can be shared by using the _shared postfix.