Aquatic Ruin Zone

Aquatic Ruin Zone
Third level, Sonic the Hedgehog 2
Number of Acts: 2
Boss: Hammer Eggman
Maximum rings, Act 1: 176 + 70
Maximum rings, Act 2: 217 + 120
Underwater areas: Yes

Aquatic Ruin Zone is the third zone in Sonic 2.

Instruction Manual Description

“	Roaming Romans infest a beautiful forest and sunken lake. Explore an intricate maze. If you're underwater, breathe the air bubbles to keep from drowning. A countdown begins when your oxygen's running out.	„
— Sonic 2 US Manual, p. 13

Sonic Team Commentary (from Sonic Jam Strategy Guide)

“	The top and bottom of this stage are built completely differently. The loops along the top are a bit different from normal. The water, also, had to have the transparency set exactly right. And then, there are so many places where the routes intersect! From Sonic 2 on, we took a patent in America.	„
— Yuji Naka

Enemies

• Grounder - Drill enemy, hides behind walls and appears when Sonic approaches.
• Whisp - Fly enemy, attacks in swarms.
• Chop Chop - Piranha enemy, moves around slowly underwater.

Technical Information

Offset	Description
0F	Aquatic Ruin Zone
$2F42	ARZ Palette
$2FA2	ARZ Underwater Palette
$D4AE	ARZ layer deformation info
$3FF24	Dynamic pattern reloading for ARZ
$4077A	ARZ misc sprite mappings
$42438	ARZ object debug list
$45610	ARZ primary 16x16 collision index
$45760	ARZ secondary 16x16 collision index
$48E94	ARZ act 1 level layout
$49264	ARZ act 2 level layout
$BB944	ARZ 16x16 block mappings
$BCC24	ARZ main level patterns
$C1434	ARZ 128x128 block mappings
$E6294	ARZ act 1 ring locations
$E642E	ARZ act 2 ring locations