Games are more fun with the Google Play Games app. We'll help you find your next favorite game – from action to puzzles. And with "Instant play," many games require no installation. Really. Save your progress and track your achievements as you level up. Plus, you can pick up where you left off from any device.

KEY FEATURES
• Instant play: There’s no installation needed – look for the "Instant play" button to instantly play full games.
• Built-in Google games: Play Solitaire, Minesweeper, Snake, PAC-MAN, Cricket, and Whirlybird – even when you’re offline.
• Save your progress: Your progress is automatically saved to the cloud when you see "Progress saved by Play Games."
• Gamer profile: Create a custom gamer ID, unlock achievements, earn XP, and level up.
• Gameplay recording: Easily record and share your best gameplay moments.

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Source: https://play.google.com/store/apps/details?id=com.google.android.play.games