Playing on unofficial or older versions might also mean you can't join official servers or play with friends who are on the latest version.
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If you are looking for this version to play without internet, there are two primary official and community methods: Official Steam Offline Mode: dota 2 offline v1014 single link link
If you have an internet connection, it is safer and more reliable to use the official Dota 2 Steam page Playing on unofficial or older versions might also
Most of the classic Dota 2 heroes are fully functional with all abilities. dota 2 offline v1014 single link link