Apk破解工具:AndroidCrackTool for Mac
http://www.52pojie.cn/thread-452617-1-1.html
如何防止Unity3D代码被反编译
http://zhidao.baidu.com/link?url=wVBpAjXBOPfjNPO0NB3z2CLenvOQDtfD6ZSD_nf-y2PyeciMmEiI9hizVhWNasVQBNDoJKfSUmiFg1C7BWHQrDRNmqR6a62YbpsFya3pi-3
Reducing the File Size of the Build
http://docs.unity3d.com/Manual/ReducingFilesize.html