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For the next 24 hours, the Humongous games are on a Humble Flash Bundle!

$20 for the Complete Pack is an absolute steal (less than $1 per game!) and they are all available DRM-Free!

For whatever reason, they are listed as "Windows only", but I'd think those using Mac and Linux should be able to get them running using ScummVM with little hassle (except Putt-Putt: Pep's B-day Surprise and PJ Sam 4, since ScummVM doesn't support them.)