Cards Against Humanity burst onto the scene and proved that card games can still go mainstream. This game is insanely fun at any gathering — well, any adult gathering — and it proves that mobile and console gaming aren’t the only options out there for adults. Cards Against Humanity is always pretty affordable at $25 for the main deck and $10 for each expansion pack, but today only, Amazon is hosting a great 20% off sale.

Here’s the game’s simple description:

Cards Against Humanity is a party game for horrible people. Unlike most of the party games you’ve played before, Cards Against Humanity is as despicable and awkward as you and your friends.

The game is simple. Each round, one player asks a question from a Black Card, and everyone else answers with their funniest White Card.

Until midnight PDT tonight, you can save 20% on the main deck, which drops the price down to $20. Then, you can also grab one or all of the six expansion packs currently sold on the site for $8 each instead of $10.

What are you waiting for?

Click here to visit Amazon’s Cards Against Humanity sale page