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Action Game - Monster Underground

Rating: 7.7/10 - 1782 votes

Take control of a giant alien worm monster as you feed on the helpless humans in Monster Underground. But the army won’t just sit back and let your rampage go unchecked. Defend yourself as you burrow underground and explode onto the surface as you eat soldiers, wreak helicopters, destroy tanks, and more. Survive for as long as you can to see how large you grow the worm monster, using the coins you earn at the end to purchase different awesome and horrible versions of the monster to play as.

How to play: Your goal is to survive for as long as you can and to grow the monster as big as you can by attacking and eating everything in your way. To control the monster, use the left and right arrow keys (touch screen for mobile users) to steer the monster whilst underground, aiming for the surface to burst through and devour an unsuspecting soldier before diving back into the earth. Once you run out of health it’s game over, so play carefully as well.

Health and speed powerups will periodically spawn below; keep an eye out for them!

Monster Underground can be played on both mobile and desktop browsers.

Before you submit an error report, please review these common issues & solutions:

  • Note: If the game is taking a while to load, please press Ctrl and F5 buttons on your keyboard at the same time to refresh the page without local cache.
  • Try using a VPN or Proxy service in case you are having a problem with Blocking or Connection Reset or see that Game does Not Load properly.
  • If you see a GAME BLOCKED message or if a game does NOT LOAD in 3-5 minutes even after page refresh - this is not blocked by us. Please speak to school/office administration or your network provider. They are blocking it.
  • If the game DOES not FIT the screen (part of the game area is below above the browser) - see the GO FULL SCREEN button just at the right above the game. This should solve it.
  • Make sure that Javascript is Enabled in your device browser.
  • You may only see a blank screen / or no game screen at all if advertisements are in any way restricted on your browser.
  • Make sure that No Ad Blocker is enabled on your browser (Many game developers only income source is through ads, so they don't make the games available if ads are blocked).
  • Even if your Ad Blocking software is disabled, it may cause an issue with loading an HTML5-based game.
  • You need a High Speed internet connection because some games use large files which take a minute or two to load for the first time.
  • Some games require you to tap/click on the game screen area when they load in order to start.
  • Playing on a different device or browser (with different settings) can often solve the issue.
  • Games are not available in all jurisdictions outside of the USA.

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