Area 1 (US: Round 23)[edit]
This area contains twenty-four Large Invaders, twenty-eight Medium Invaders and ten Small Invaders in two separate horizontally-moving formations; the song you will be hearing from that Yamaha YM-2610 is another new composition.
Area 2 (US: Round 24)[edit]
This area yet again contains twenty-two Large Invaders, twenty-two Medium Invaders and eleven Small Invaders in a horizontally-moving formation; but this time, when one is killed, the remainder of its column drops down to the bottom of the formation. Also - starting from this world, the UFOs will speed up once they've passed over either of the CG30.
Area 3 (US: Round 25)[edit]
This area (again) contains twenty-two Large Invaders, twenty-two Medium Invaders, and eleven Small Invaders in a horizontally-moving formation; however, some of the invaders shall break away from it and fly around directly above the two CG30s, while firing bullets down at them from there and screeching metallically from the Yamaha YM-2610. Once you've cleared it, you'll proceed to the second "Cattle Mutilation", but if you're playing the US version, you will proceed to World 3C, or "Round 26" - the theme of which is, once again, the remixed original theme from World 1A.