You might remember Humble's Indie Mega Week Promotion.
It is back for the currently running Spring Sale.

Instructions:
You visit the store page to collect a stamp.
You claim your rewards here.
And will find your prices either here or here.

You get:

Stamps Reward
1 10% OFF ONE MONTH OF HUMBLE MONTHLY (new subscribers only)
2 25% discount coupon on MachiaVillain
4 Fortified

This week's Mission ends on May 24th at 10am PDT. Your stamps will not carry over, so act fast!.

Week 1 is running until May 17th at 10AM PDT. - Over
Week 2 is running until May 24th at 10am PDT. - Over
Week 3 is running until May 28th at 10am PDT.


Edit, a better guide on how to get your stamps from AquilaSol - credit goes to him/her, I copied it from here - thank you!

The claim button unlocks the reward. The name is a bit misleading, you don't trade stamps for rewards. Claiming a game does not remove that amount of stamps.

So once you get 1 stamp, you can unlock the voucher.
When you collect 2 more stamps, and have collected 3 in total, you can unlock the first game.
When you collect 2 more after that, and have collected 5 in total, you can unlock the second game.

You get stamps for clicking on the sale banner at the top of the Store page, and for every $5 you spend in the store. If you're not sure where to click, just click on the stamp image at the top of the store. If you can't see it, make sure you turn off your adblocker. (Some mistake it for an ad.)

(I had to physically click on the banner, the stamps didn't get added by itself from just visiting the page.)

The first set of stamps can be collected in the first week of the sale, so there are 7 chances to earn stamps via daily visits. If you miss a day, you can still get the games. (Missing a day does not cost you any previously collected stamps.)

You can view your progress and claim the unlocks on the Mission page. You can access this by clicking on your email/name at the top right, and clicking on Missions.

This week's Mission ends on May 17th at 10am PDT, at which time a new Mission will be enabled for the second week of the Spring Sale. Your stamps will not carry over and a new set of rewards will be available.

Make sure you claim all first-week rewards BEFORE the first third mission ends on 28 May 10AM PDT. The page and all collected stamps will reset at that moment, and you can not go back and unlock the first third week's rewards after that. (claimed rewards will be in your library.)
For all other timezones, here's a conversion of that time to all local times on TimeandDate.com.
And here's a countdown.

6 years ago*

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I missed a day :///

6 years ago
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same here, dammit

6 years ago
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same damn..and some ppl begun to make giveaways 3 days ago..a mistery..

6 years ago
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Thanks for making us aware of the wishlisted game being given away. Got it, very nice.

6 years ago
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I missed a stamp too, hmm... does buying a bundle give you a stamp? Probably not, huh?

6 years ago
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Spending 5$ in HB store - bundles are their own category. If you really want the game, you can have mine, I really can't see myself playing it.

6 years ago
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I do want it, but it's not a big deal if you'd like to keep it instead, either way! :) I have some keys lying around if you want something, but I don't think I have anything rare or valuable.

6 years ago
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That's cool, sounds like a fair trade for a game I got for checking out a store for 4 days :P

6 years ago
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Be careful. i didn't miss, but humble does not give me last stamp (clearing cookie, incognito mode e.t.c).

6 years ago
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Got my last stamp, thanks!

6 years ago
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Missing a stamp... Can anyone recommend a good 5-10 dollar game on the HumbleStore?

6 years ago*
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Grim Dawn, or Borderlands 2 GOTY.

6 years ago
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Got it. Thanks for making this post and keeping it updated, I'd have missed this last game otherwise. :)

6 years ago
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For those who missed getting stamps:

  1. Were you making sure to visit the main store page? Going to any other page in the store would NOT work. It had to be the main store page ONLY.

  2. Were you making sure that you were going to the store page after 5pm GMT? If you go to the store page before the turnover time, then you wouldn't get a stamp, and you'd have to come back BEFORE the next turnover time to get the stamp for that day. In other words, if you visited the page at 4pm GMT you wouldn't get a stamp because you'd be TOO EARLY and would need to come back after 5pm GMT that day but BEFORE 5pm GMT the next day or you'd miss a stamp.

  3. You get IMMEDIATE feedback when you've gotten a stamp so there was no reason to be surprised that you had missed any of them. If you didn't see the indicator come up showing how many stamps you'd collected when you visited the store page, then something was wrong, and you could have contacted support right then.

6 years ago
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Ya some how I must have just forgotten to visit and missed a day. Hopefully the game will get bundled at some point and I can pick it up then. Thanks

6 years ago
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they run out of keys for fortified

6 years ago
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Fortified.

"Keys are temporarily exhausted for this product"

6 years ago
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Same

6 years ago
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would using store credit get me a stamp?

6 years ago
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It did for me in Week 2.

6 years ago
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So were there other free games for the first two weeks?

6 years ago
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Week 1 and Week 2.

6 years ago
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So this was running for more than 1 week. I missed last week and apparently the current one too. Shit.

6 years ago
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Has been broken since yesterday, couldn't get the last stamp. no matter where I log in from. I got all the previous giveaways so its definitely an issue on their end

6 years ago
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The timer resets at 10am PDT, which is 7pm where I live. If you clicked after 10am PDT yesterday, you can click thousands times today, no stamp will pop. You might have been time-zone-trolled.

6 years ago
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what ahppened to me and so i missed the last stamps..damn i really want this game..not the other one i already have 12 better than 6...if someone wanna do a change let me know. thanks

6 years ago
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Yeah, missed the last stamp this week also. :-(

6 years ago
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Oh didn't realize it had gone on for so long. I missed the first week entirely. Got those games elsewhere though.

6 years ago
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You can always trade for them, they're cheap since they're kinda freebies.

6 years ago
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Yeah I meant that's what I did. I would have gone for Willows had I known about the stamps though. Would have saved myself some credits.

6 years ago
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Oh well, at least you didn't lose much. :D

6 years ago
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Are keys for 12 is better than 6 still exhausted or its bugged just for me?

6 years ago
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I get "Keys are temporarily exhausted for this product" (hadn't tried it yet), but it does promise to add them to the page and send me an email when they're available. The DRM-free download looks to be available.

6 years ago
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Yeah thats the case for me so i suppose its normal, i was just worried if that was really the case after so many days. Thanks for the help:)

6 years ago
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ffs i miss it (

6 years ago
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If I didnt claimed Fortified even though I got the 4 stamps, do I lose the chance to redeem the game?

6 years ago
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Nope

6 years ago
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Fortified has been restocked for those guys got all of stamps but keys were exhausted!

6 years ago
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Closed 4 years ago by Nyuels.