M.E.T.A.N.G stands for "Metal Enormous Tank of Atrocious Necromancing God". Destroying its firing base takes 10,000 hits. Then comes the stabilizer, which when destroyed will slow it down by 10% and takes 10,000 hits to destroy. Finally, there are the tracks which take a mouth dropping 100,000 hits. Its speed is the same as a blue bloon. It appears on round 120 and there's no saving yourself from it getting through. Even with a number with hundreds of digits of lives, you will still die, because the game ends when it gets through.