Monument Valley is the biggest prize in the latest Amazon app giveaway. The online retail giant has put $50 worth of paid Android apps games on sale for the always-excellent price of free.

The clever Monument Valley game includes the add-on Ida’s Dream, which was formerly an in-app purchase. The Forgotten Shores addition will still cost $1.99, but it’s well worth it for the challenging visually impressive game.

Here’s the rundown of the other titles. Don’t forget you’ll need to install the Amazon Appstore for Android on your device to download get updates for these apps. Head to Amazon to install any of these selections:

• Monument Valley
• ather ve
• The Bard’s Tale
• Quell: Memento
• Airport Mania 2: ld Trips
• Monkey Racing
• Table Top Racing
• tinyCam Monitor o for ICam
• Simply Yoga
• Deep Under the Sky
• Trouserheart
• arm Clock o
• Crazy Rocket
• Mystery Case Files: Return to Ravenhearst
• M.A.C.E.
• AVG AntiVirus o Android Security
• Endless Skater
• Mirroring360 – Airay Receiver
• No Gravity (Kindle Tablet ition)
• Knock-Knock
• AirReceiver
• Fantastic 4 in a Row 2
• Exiles

The story behind the story: About every few months Amazon puts a bunch of paid apps games on sale. The goal is to get you to check out its alternative Amazon Appstore get invested in the ecosystem. th a bunch of paid apps games for free Amazon hopes you’ll buy future apps from them instead of ay.