After freeing the monster prisoner in Geometry Dash, here's what happens and what you can do next.
The imprisoned monster, also known as the Demon Guardian, is an NPC in Geometry Dash that you can free by collecting 3 keys hidden around the game.
After collecting these 3 keys, the monster tells you he will destroy Geometry Dash and he disappears.
You will also get a chest filled with icons, the key to the Demon Gauntlet, and other rewards.
After you free the monster, you will get access to the Demon Gauntlet. You can complete that gauntlet to get a really cool looking spider icon.
After that, you will need to wait for the next update, Geometry Dash 2.2, to continue.
It is likely that these items will prove useful once Geometry Dash 2.2 is released.
To free the monster, you will need to unlock and complete the basement quest. Fortunately, we wrote an entire, in-depth guide to help you!
For more help with unlocking all Geometry Dash secret areas, see our complete vaults and secrets guide.
For more information on when Geometry Dash 2.2 will release, see our 2.2 release date announcement.