Zombie Outbreak – Hints Scroll down to the puzzle that is challenging. Click on the first hint. If that is not enough of a hint to complete the puzzle, feel free to click onto the next one and so forth. Dr. Joseph Lister’s Pressure Graph Puzzle Hint # 1 Hint # 2 Hint # 3 Hint # 4 Dr. William Harvey’s Test Tube Puzzle Hint # 1 Hint # 2 Hint # 3 Hint # 4 Dr. Robert Koch’s Light Puzzle Hint # 1 Hint # 2 Hint # 3 Dr. Edward Jenner’s Bottle Puzzle Hint # 1 Hint # 2 Hint # 3 Doctor Circles Puzzle Hint # 1 Hint # 2 Body Parts Puzzle Hint # 1 Hint # 2 Hint # 3 Phobias Puzzle Hint # 1 Hint # 2 Hint # 3 Hint # 4 Zombie Brain Function Test # 71 Puzzle Hint # 1 Hint # 2 Hint # 3 Zombie Brain Function Test # 45 Puzzle Hint # 1 Hint # 2 Hint # 3 Hint # 4 Formula Grid Puzzle Hint # 1 Hint # 2 Hint # 3 Hint # 4 To Reset the Game and Play Again Game Reset Directions