Humble Bundle is having a busy day. They’re currently offering the Humble GameMaker Bundle and launching an end-of-summer sale on their online store. As an added bonus, Tropico 4 is being offered for free for a limited time.

The Humble GameMaker Bundle is in support of Doctors Without Borders. For $1 you can pick up GameMaker: Studio Pro, Uncanny Valley, INK, and Cook, Serve, Delicious! Paying more than the average gets you the GameMaker HTML 5 Module, Home, and Solstice. Cough up $15 or more and you’ll get the iOS, Android and Windows UWP Modules for GameMaker. Every tier also includes the source code for various games.

Over on the Humble Store, the End of Summer Sale is live, with discounts on games like Fallout 4, Stardew Valley and Alien: IsolationTropico 4 is free to download and redeem on Steam, but only for another day or so, so act now.

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