Difference between revisions of "Oil Ocean Zone"

Revision as of 11:06, 23 June 2008

Oil Ocean Zone

Seventh level, Sonic the Hedgehog 2
Number of Acts: 2
Boss: Submarine Eggman II
Maximum rings, Act 1: 207 + 50
Maximum rings, Act 2: 183 + 80

Oil Ocean Zone is the seventh zone in Sonic 2.

Instruction Manual Description

Robotnik's refineries are pumping at full steam. Crude oil has turned the ocean black. Can Sonic keep his footing on the slippery catwalks and bursting steam vents?

Sonic Team Commentary (from Sonic Jam Strategy Guide)

“	This stage was made by Tom on the SOA staff, it was amazing what could be made with the Mega Drive at the time. But if the Sonicness of it wasn't coming through, sometimes the artist had a taste for darker color schemes, we would fix up certain pieces of it.	„
— Yuji Naka

Enemies

Octus - Octopus enemy, levitates and fires a missile when Sonic approaches.
Aquis - Seahorse enemy, floats around quickly, firing globules of oil at Sonic.

Technical Information

Offset	Description
0A	Oil Ocean Zone level value
$2CE2	OOZ Palette (0E)
$CC66	OOZ layer deformation info
$400C8	OOZ animated pattern load cue (4)
$405B6	OOZ misc sprite mappings (empty)
$420E8	HPZ/OOZ object debug list
$45100	OOZ primary 16x16 collision index
$47404	OOZ act 1 level layout
$47784	OOZ act 2 level layout
$A3364	OOZ 16x16 block mappings
$A4204	OOZ main level patterns
$A6384	OOZ 128x128 block mappings
$E5260	OOZ act 1 ring locations
$E5422	OOZ act 2 ring locations
$E8DA0	OOZ act 1 sprite locations
$E9214	OOZ act 2 sprite locations

Technical notes

Oil Ocean's "sinking pool" mechanic was reused in Marble Garden Zone, though it's not nearly as expansive there.

In this zone, the ground is supported by numerous small pillars that extend down to the oil, but not all the way. Because of this, the player can spindash in the oil while standing against one of these pillars to go under it. In this way, it's possible to travel at the very bottom across the whole stage.

Template:Sonic2Levels

@@ Line 11: / Line 11: @@
 *[[Octus]] - Octopus enemy, levitates and fires a missile when Sonic approaches.
 *[[Aquis]] - Seahorse enemy, floats around quickly, firing globules of oil at Sonic.
-==Differences between Wai beta and final==
-* The sun scrolls with the background, and is non-animated.
-* Wooden balls are embedded in the ground, and can be activated by pressing a nearby switch. They will pop up and move to the left at a fixed speed. Sonic can stand on these balls while they travel. They were dropped as a gameplay element from the final, possibly because nobody could think of a good use for them, but the chambers and switches can be placed with [[debug mode]], and both have the same behavior as in the beta. Wooden balls were seen in prototype shots of ''[[Sonic the Hedgehog (16-bit)|Sonic the Hedgehog]]'''s [[Green Hill Zone]], and can be seen in this game's debug mode, but they cannot be placed.
-* Two seahorse enemies are found within the prototype ROM through hacking.
-* An unused, shoot-and-flee octopus enemy is found within the prototype ROM through hacking.
-* The oil splashing animation is missing and oil slides have no effect on Sonic.
-* A pipe in the level's background is sucking oil up instead of pouring it out.
 ==Technical Information==