Don't let radioactive waste pile up on the seabed so high that it reaches the surface! The game is in Dutch, but Tetris is a universal language, right? Left/Right arrows move the piece left or right, up key flips it 90 degrees. Shockingly, barrels of radioactive wastes WERE actually dumped in the sea in the 1980s, until Greenpeace did something about it. When you're through playing the game, sign up as a cyberactivist and be a part of the next victory.