If you're looking for alternatives, you can consider:
A license key is required to activate the full features of GameMaker Studio 8.1 Pro. Here are a few things to note: license key for game maker 81 pro link
: YoYo Games recommends migrating to the current version of GameMaker , which offers a free tier for non-commercial use and a Professional license for commercial projects. Managing Legitimate Legacy Licenses If you're looking for alternatives, you can consider:
If you are looking for a legitimate way to activate the Professional features of this legacy software, here is the current situation: Users who have lost their original keys are
: If you previously purchased a legitimate license, it remains valid for use . Users who have lost their original keys are advised to contact the YoYo Games Helpdesk with proof of purchase to attempt key recovery .
YoYo Games officially removed GameMaker 8.1 from sale on May 18, 2015 .