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SpongeBob SquarePants Grand Sand Fortress: Tetris Defense

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Grand Sand Fortress is a fun online Tetris-type base defense game where you build a wall for SpongeBob to protect him from the evil Planktons. They think SpongeBob has the Krabby Patty formula. Does he? Doesn’t matter. They are coming in waves for him, regardless.

  • Move your bricks to build a wall.
  • The wall needs to be strong enough to withstand waves of attacks from the Plankton.
  • Plankton can also fly in on paper planes. Who knew.

Overall

Design

Difficulty

Replay

Play SpongeBob SquarePants Grand Sand Fortress Game Online

Kids and adults can play this online SpongeBob SquarePants base defense game by clicking in the window below.

Alternatively children can play this free online SpongeBob SquarePants castle defense game as a web application here.

Spongebob Squarepants Grand Sand Fortress Game Play Instructions

How to Play

Lay blocks to build a wall to prevent the waves of Plankton getting to Spongebob.

  • Starting the Game
    • Click anywhere on the screen to start the game.
      • An animation will explain the game concept and show the instructions.
      • Click on the mouse button to advance the screens.
  • Game Controls
    • Use the direction arrow keys and space bar to control and organize the falling blocks into an impregnable wall.
      • The spacebar rotates the blocks.
      • Left and right arrows move the blocks left or right.
      • The down arrow quickly drops the blocks.
    • The pause button at the top right of the screen gives access to the game control menu.
      • The play button returns you to the game.
      • The ? button shows game instructions.
      • The speaker button toggles the sound off and on.
      • The X button restarts the game.
  • Game Play
    • Building a wall
      • Ideally, you want to form a solid wall with no gaps. Spin the falling shapes to fit them together.
        • It is ok to leave gaps provided your reason for doing so is it helps you build a 2 by 2 shape of the same building material.
      • It’s unlikely you’ll have time to build a complete wall. Build the biggest wall you can in the time available.
      • Not all blocks are equal. Sand is strong. Stone is stronger. Brick is the strongest.
      • Don’t wait for the bricks to fall. Once you have them aligned, force them down into place with the down arrow. This will buy you more bricks within your time limit.
      • You can extend your build time limit by creating a four block shape of the same type in a 2 by 2 grid.
        • The 2 by 2 grid must use the same type of building material in all 4 squares.
        • Stronger materials add far more time to your remaining build time.
        • See the instructions for examples.
      • Don’t let your wall get too high, too early. You will find it difficult or impossible to build a solid low level defense & to maneuver pieces to make 2 by 2 squares which give you extra build time.
      • The indicator on the top right will show you the next shape that will fall.
    • Defense strategy
      • How attack waves change
        • As the levels increase, the waves of Plankton will not only mount a ground attack, they will fly at you, too. Be sure to build high as well as wide to defeat them.
        • In earlier rounds, where there are no flying Plankton, you can focus on defeating a ground attack by building across the bottom.
      • The castle indicator on the right side of the screen shows you how many lives you have left.
        • Weak defenses will cost you lives.
        • When you lose a life you still advance to the next level provided you had at least 2 lives remaining before failing the level.
        • The lives count includes the existing game, so when there is only 1 castle to the right that is your last life.
      • The attack indicator on the left shows you how long the current attack wave will last.
        • You do not need to make a complete defense across the entire width of the playing field.
        • To advance to the next round all you need to do is have at least one square remaining when the attack wave is done.
        • The best way to have squares remaining is to quickly drop pieces into the playing field and try to make the squares which give you more time to lay more pieces.
          • If you drop a piece which has 2 of the same material next to each other try to ensure both of those pieces either face upward or toward the inner portion of the level so it is easy to match other pieces next to it.
  • Audience
    • This game suits all ages. Anyone who has enjoyed Tetris should also enjoy this comic spin on the classic game.
    • There are no adult themes in this game.

Like This Game? Review This Level Defense Sand Puzzle Game for Kids

SpongeBob SquarePants Grand Sand Fortress: Tetris Defense
4.6 / 5 Editor
{{ reviewsOverall }} / 5 Users (1 vote)
Overall4.5
Design4.8
Fun4.7
Originality4.6
Replayability4.5
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Spongebob Squarepants Grand Sand Fortress Game Screenshots

Spongebob Squarepants Grand Sand Fortress Welcome Screen Screenshot.
Spongebob Squarepants Grand Sand Fortress How To Play Screenshot.
Spongebob Squarepants Grand Sand Fortress Instructions Screenshot.
Spongebob Squarepants Grand Sand Fortress Play Tips Screenshot.
Spongebob Squarepants Grand Sand Fortress Extra Tips Screenshot.
Spongebob Squarepants Grand Sand Fortress Game Screenshot.
Spongebob Squarepants Grand Sand Fortress Result 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: Base Defense, SpongeBob, Tetris. You can visit any of them to select other fun games to play.

Our site hosts thousands of free online games. Play a random game!

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2 comments on "SpongeBob SquarePants Grand Sand Fortress: Tetris Defense"

  • Joey says:

    This is not your average Tetris clone. While the principle seems similar, that’s where the resemblance ends. The blocks aren’t shaped like tetrominoes. They come in 1, 2, 3, and 4-unit increments. Many of these blocks are also shaped weirdly, which can complicate construction.

    Your goal is to survive waves of attacks from Sheldon Plankton’s army of minions. To do that, you must arrange blocks to form a barrier before each wave of minions arrives. You don’t need to make a full wall to keep the minions from crossing. The structure you make just needs to survive in some form through the wave. Holes are not an issue. Structural integrity, however, is.

    The blocks come in three different materials of varying strengths. Sand is the weakest, while stone is the strongest. You must build a structure that will survive the incoming waves of minions. Arranging a 2 x 2 square of blocks of the same material also buys you a little more time before the wave starts. Naturally, stone provides the biggest delaying bonus when stacked that way.

    It’s an interesting take on the wall building concept and quite fun. It takes a while to get used to, but it’s worth getting the hang of. The surf rock background music adds to the experience.

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