Take your drilling robot to the depths of earth to search for the valuable resources. Collect several rubies and diamonds by drilling through the underground walls and tunnels. Use the arrow keys to move around and hit the space bar to start drilling. You can drill in any direction you want. Collect all resources to complete the level. Keep an eye on your fuel meter which will be consumed when you double tap your up key to make a boost jump. The heat meter increases as you keep drilling. As you go deeper the heat keeps increasing. Use your resources to buy upgrades and fuel. Glean is one of our many Action Games that we publish on TheGamerStop.com. This game is also tagged as a Robot game. Click the play button to start having fun. To play even more free games, view our popular and new games page. If you want to play more games like this, then you can simply check out the games inside the game tags that are the most relevant to your interests or the Action Games category or the games like this game page at the end of the game tags.