Rather than searching for an outdated "Master Collection" download, you can now download GameMaker for free directly from the official GameMaker website. master collection - GameMaker Community
The was a legacy license tier from the GameMaker: Studio 1.x era that provided access to all available export modules (Windows, iOS, Android, etc.) for a one-time high cost. GameMaker: Studio Master Collection Free Download
Today, this specific "Master Collection" version is no longer sold or officially supported. It has been superseded by a new, more accessible pricing model for the latest version of GameMaker. Complete Review of GameMaker's Current Free Access Rather than searching for an outdated "Master Collection"