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Drop Sum: Vertical Block Stacking Game

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This is an easygoing falling blocks game inspired by Tetris. The catch is that instead of forming lines, you form stacks. The game removes block stacks if their height equals the number shown on the bottom center of the screen.

  • Play through 2 game modes and 3 difficulty levels.
  • Choose whether to include negative numbers in your game.
  • See how high your score can go.





Play Drop Sum Game Online

Children and parents can play this numerical block counting game by clicking in the window below.

Alternatively kids and adults can play this falling blocks addition and subtraction video game for free as a web application here.

Drop Sum Block Counting Game for Kids Game Play Instructions

How to Play

Clear a stack of blocks by matching them to the sum of the number at the bottom of the screen.

  • Starting the Game
    • Select the Let’s play button at the bottom of the opening screen to proceed to the welcome screen.
    • On the welcome screen, select the game options you want to play, then select go at the bottom center corner to begin.
  • Game Controls
    • Desktop
      • Use the left and right arrow keys to change direction.
      • Speed up the descent of the block stack using the down arrow key.
      • Use the up arrow key to alter the value of the special ball.
    • Touchscreen devices
      • Although this game might load on touchscreen devices, its controls were optimized for desktops with keyboards.
  • Game Play
    • Basic
      • Standard rules
        • Stack the blocks until their sum forms the number shown at the bottom center corner of the screen.
          • Gain coins each time you clear a stack of blocks.
          • If your stack more than 10 blocks, they become solid and unremovable.
          • If a monster hits one of your block stacks the blocks in that stack become solid and unremovable.
        • The game ends when any block stack reaches to the top of the screen.
      • Custom rules
        • Make 10
          • Create stacks of 10 blocks.
          • This value remains static throughout the game.
        • Random 2-9
          • The stack of blocks you must remove range from 2 to 9.
          • The game shows you both the present and next sums you must reach to remove the block tower.
          • Each time you clear a stack, the value of the stack you must remove changes.
          • If you have negative numbers turned on you can build a stack by removing a quantity from a stack.
          • If you already have the correct stack amount in place before the number is assigned then that stack does not count toward the goal. You must add or remove blocks to a stack and reach the goal while it is active.
          • If a stack reaches 10 blocks or higher, it cannot be removed.
    • Special blocks
      • Negative blocks
        • Negative number blocks reduce the size of block towers.
          • If allowed to stand alone, they disappear.
          • They can be helpful in removing blocks from taller towers or keeping them short.
        • You gain no coins from using negative blocks to remove block towers.
        • You can turn negative blocks on and off on the welcome screen.
      • Special balls
        • A special ball can be converted to any stack of numbers based on the number it shows.
        • To change the value of the special ball, use the up arrow key.
        • Use special balls to clear out stacks fast.
      • Purple enemy blocks
        • If these blocks land on a stack, the entire stack become unremovable.
        • Move them away to keep them from freezing a block stack you want to clear.
    • Tips
      • Keep most of your stacks to one side. This gives you room to dispose of purple enemy blocks.
      • Consider playing with negative numbers on. This can keep you from stacking your blocks too high.
      • Be prepared blocks to fall from any position. If you have columns near the top of the screen be quick to move the blocks away if they appear near them.
      • One can make a lot of mistakes when changing the value on the special balls. If you are prone to make those errors it can be fine to just leave them as their default value and add or subtract from other columns using other blocks.
  • Target Audience
    • The game is suited for fans of relaxing math puzzles & less intense games which are similar to the concepts in Tetris.
    • The game has no adult content.

Like This Game? Review This Block Adding & Subtracting Game for Young Girls & Boys

Drop Sum: Vertical Block Stacking Game
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Free Online Drop Sum Game for Children & Adults Screenshots

Drop Sum Game Welcome Screen Screenshot.
Drop Sum Game How To Play Screenshot.
Drop Sum Game Instructions Screenshot.
Drop Sum Game Play Tips Screenshot.
Drop Sum Game Controls Screenshot.
Drop Sum Game Extra Tips Screenshot.
Drop Sum Game Start Screenshot.
Drop Sum Game Play Screenshot.
Drop Sum Game Block Stacks Screenshot.
Drop Sum Game Over Screenshot.

Mobile Friendly Cross Browser Support

This game is rendered in mobile-friendly HTML5, so it offers cross-device gameplay. You can play it on mobile devices like Apple iPhones, Google Android powered cell phones from manufactures like Samsung, tablets like the iPad or Kindle Fire, laptops, and Windows-powered desktop computers. All game files are stored locally in your web browser cache. This game works in Apple Safari, Google Chrome, Microsoft Edge, Mozilla Firefox, Opera and other modern web browsers.

Where To? What Next?

This game was published in these categories: Addition, Tetris. You can visit any of them to select other fun games to play.

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