March's Humble Monthly Bundle revealed:

• Wasteland 2: Director's Cut (also seems to come with non-Director's Cut Wastleland 2 and the first Wasteland)
• GRAV
• Shantae and the Pirate's Curse
• I Am Bread
• Sentinels of the Multiverse: The Video Game
• ARK: Survival Evolved (early unlock)
• Battlesloths (non Steam)
• Switchcars (Humble Monthly Debut)

For April's bundle, there are two early unlock games: South Park: The Stick of Truth and This War of Mine.

April's Humble Monthly is out. At this point, I basically just treat it as "Is the early unlock game(s) worth $12?" If so, buy, if not, no.

• Nuclear Throne
• Renowned Explorers: International Society
• Nova-111 (previously on PS+)
• The Magic Circle
• Super Avalanche
• South Park: The Stick of Truth (early unlock, no cards)
• This War of Mine (early unlock)
• Tailwind Prologue (Humble Original, non Steam)
• Stikbold! (Humble Original, no cards)

Next month's early unlock: Mad Max (2015)

There seems to be an advantage in unsubscribing before you're billed for the next month (though you lose your 10% Humble Store discount when you do so) and then resubscribing in that you can then use a coupon for buying a bundle (even at the $1 level) to get 10% off the Humble Monthly fee, and thus pay $10.80 instead of $12

and for the record, Mad Max at $12 is a historic low price as far as I'm aware. I've only ever seen it dip to $15 once, it's usually closer to $20 on sale.

Bit late posting this one because I didn't subscribe this month, but, here's the May bundle:

• Mad Max (early unlock)
• Infinifactory
• Crawl
• Jumpjet Rex
• Fran Bow
• Oddworld: Abe's Oddysee: New & Tasty
• Galak-Z
• 1993 Space Machine
• Gunmetal Arcadia Zero (non-Steam, Humble Original)

Early unlock for June bundle is Rocket League