AppGameKit Classic
AppGameKit Classic: Easy Game Development
Looks like it had been free in the past~ So probably some people already have it!
03 October 17:00 - 05 October 17:00 UTC
Any of the steps works.
• Just open Software Link below and click Add to Account.
• ArchiSteamFarm: !addlicense ASF sub/499398
https://store.steampowered.com/app/325180/AppGameKit_Classic_Easy_Game_Development/
Click add to account