You make the game. What is ROBLOX? ROBLOX is the Game Powered by Players. Build your own game world and bring it to life, publish and share it, experience what others have created, play with friends. ROBLOX is the leader in user-generated creation and gaming for all ages. What will you build? ROBLOX on your device Play ROBLOX on your desktop, your tablet, or your phone. Access your account, games, and inventory; connect with your friends; and play games whether you're at home or on the go.