Area 1 (US: Round 29)[edit]
This area (yet again) contains twenty-two Large Invaders, twenty-two Medium Invaders and eleven Small Invaders in a horizontally-moving formation; the song you shall hear from the Yamaha YM-2610 is also identical to that for World 1A.
Area 2 (US: Round 30)[edit]
This area is containing six Type 19 Special Invaders, five Type 20 Special Invaders, six Type 21 Special Invaders, five Type 22 Special Invaders and six Type 23 Special Invaders in a horizontally-moving formation; when one of them gets hit for the first time, it will split into two, which adds up to a total of fifty-six invaders. One more area to go for this world.
Area 3 (US: Round 31)[edit]
This area is containing 22 Large Invaders, 22 Medium Invaders and 11 Small Invaders in a horizontally-moving, wrap-around formation; once you've cleared it, you'll proceed to the second "Cattle Mutilation" (for both versions of the title).