Sonic Fine2uned

Discussion in 'Staff Projects' started by Clownacy, Nov 21, 2017.

  1. Clownacy

    Clownacy Forever Grumpy Staff

    Joined:
    Aug 15, 2014
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    Huh. The EU/US release date of Sonic 2 was "Sonic 2s day", on the 24th, but the JP one was the 21st. Today's the 21st, and a Tuesday...

    Er, anyway, Sonic 2 is very buggy. Looking at the massive bugfix thread should be a good indication. That thread also seems to indicate that some people want a hack that tries to fix as many of these bugs as possible. Well, this is that.

    Broken Chemical Plant Zone door?
    [​IMG] [​IMG]

    Broken multisprite mirroring in 2-player?
    [​IMG] [​IMG]

    Inconsistent 'E's in the title screen?
    [​IMG] [​IMG]

    Tails's macho-man arms?
    [​IMG] [​IMG]

    What else?
    Fixed a huge number of issues in the sound driver (check FixDriverBugs in the Git disasm for more info)

    Fixed demo playback not emulating held buttons

    Fixed Nemesis decompression race condition crash

    Fixed Sonic being able to turn Super after touching the signpost and softlocking the game

    Fixed Sonic being able to turn Super after opening the animal capsule, and hanging in the air

    Fixed Super Sonic being abnormally fast after transforming underwater

    Fixed Super form ring drain speed so it's *actually* one ring per second

    Fixed Super Sonic roll deceleration speed so it's not unnatural

    Fixed Super Sonic's transformation being glitchy when you've already transformed once in the level before

    Fixed Super Sonic transformation palette fade so the last colour isn't skipped

    Fixed Super Sonic transformation palette fade being incorrect when underwater

    Fixed Tails' roll deceleration speed so it works like S2 Sonic instead of S1 Sonic

    Fixed roll-jumping using Sonic's regular collision hitbox

    Fixed the player's jump height being nerfed when jumping out of shallow water

    Fixed spin dashing when at the level boundary

    Fixed spin dash losing its speed if you jump immediately after releasing

    Fixed numerous drowning bugs

    Fixed camera jittering up and down when rolling while playing as Tails

    Fixed Tails' tails bugging out when he's stood next to a solid object

    Fixed Tails' tails so they flash too when he gets hurt

    Fixed Tails respawning with the wrong speeds if he died underwater

    Fixed rings accidentally deleting in levels that wrap vertically

    Fixed scattered rings so their despawn isn't delayed if you quickly lose rings again

    Fixed monitors so you don't pass through them when jumping at them from the side

    Fixed EHZ scrolling bug at the bottom of the screen

    Fixed CPZ boss goo not hurting Sonic if he ducks

    Fixed ARZ boss pillar so you can't fall through it by jumping on it

    Fixed ARZ boss arrows, so you don't hover by walking off one of them

    Fixed ARZ boss pillars so you don't hover if you're stood on one when the boss is defeated

    Fixed ARZ boss animations freezing when it hurts the player

    Fixed a bunch of strange CNZ boss behaviours when you first hit it

    Fixed HTZ background so part of it doesn't jitter when scrolling

    Fixed OOZ launchers making Sonic fast if he falls into one after getting hurt

    Fixed final boss's collision, so you don't get sucked into it and die if you hit it a certain way

    Fixed MTZ/HTZ/ARZ bosses so their parts don't fall off in the wrong direction when you beat them

    Fixed multiple bugs involving Sonic/Tails using the wrong speeds

    Fixed Tails not getting a smaller hitbox when he ducks

    Fixed Sonic/Tails glitching out if they fall into a CPZ pipe by being hurt

    Fixed AI Tails using the wrong sprite when flying because he hit a forced-roll object, the EHZ spiral, or the MTZ cylinder

    Fixed the camera warp trick seen in speedruns

    Fixed the second player's background being wrong in two-player CNZ

    Fixed MTZ's wall springs/MCZ's vines locking Sonic/Tails' controls when you roll-jump into them

    Fixed Silver Sonic/ARZ/OOZ/MTZ boss strange behaviour when you beat them on a certain frame

    Fixed MCZ boss writing to a random part of the Mega Drive's memory

    Fixed the horizontal level wrap trick seen in speedruns

    Fixed MCZ boss not laughing when he hurts Sonic/Tails and they drop rings

    Fixed bridges interfering with Sonic in debug mode

    Fixed various instances of the game clearing too much memory

    Fixed object collision from below

    Removed duplicate WFZ PLC entries

    Fixed sprite table overflow (Ashura glitch)

    Fixed ARZ waterfall corrupted graphics

    #Fixed strange notes in CNZ credits music

    Fixed CNZ act 2 background blank row

    Fixed DEZ/CPZ door sprite so they're not corrupted

    Fixed debug mode having an inconsistent camera Y-deadzone

    Fixed ARZ pillar objects disappearing while on the edge of the screen

    Fixed getting a Game Over in HTZ corrupting the Continue screen

    Fixed ARZ/MCZ/DEZ boss rumbling causing the background to distort

    Fixed HTZ bridge stakes objects disappearing while on the edge of the screen

    Fixed starting the game through the options menu not reseting the number of collected Chaos Emeralds

    Fixed Sonic keeping his invincibility stars when he goes Super

    Fixed multi-sprite objects not mirroring in 2-player

    Fixed drowning next to a monitor causing Sonic to die in his walking animation

    Fixed Tails' pushing animation oddities

    Fixed DEZ music not resuming after beating Silver Sonic

    Fixed objects like the MCZ crushing pillar being able to make Sonic enter his walking animation while charging a spin dash

    Combined REV02's bugfixes with REV00's missing features.
    - Fixed game crash that happens when you enter debug mode while dying and place an object
    - Invisible wall object is now visible in debug mode
    - Invisible MTZ wall bumper object is now visible in debug mode
    - Fixed crash that occasionally happens when you kill a Rexon

    Fixed errors in Sonic's mappings (one walking frame, and the black-and-white frame of his transformation)

    Fixed the player being able to walk around during the tally after touching the signpost by jumping near the right side of the screen

    Improved boot time

    Removed duplicate/inaccessible rings and objects

    Fixed Sonic's hand disappearing for one frame on the title screen

    Fixed a certain wall in CPZ2 that you could walk through by jumping over a plane switcher object

    Sped up level loading

    Fixed HTZ solidity so it's not possible to fall so fast that you clip through the floor and die in that one tall lava room in act 2

    Restored un-clipped Snare, Kick, Timpani, and Sega samples from Sonic 1

    Made drums fade with the rest of the music, instead of immediately going silent

    Fixed inconsistent 'E's on the 'THE HEDGEHOG' part of the title screen

    Fixed Super Sonic transformation not taking Sonic out of ball-mode (roll-jump control lock, smaller hitbox)

    Fixed ARZ having too many blocks, causing it to overflow its RAM buffer

    Fixed Sonic/Tails not slowing down, or creating a splash, if they fall into water after getting hit

    Fixed Level Select icons showing the wrong palette briefly right after changing the selected zone

    Added an invisible block to prevent a certain falling pillar from pushing you through the level in ARZ1

    Added an invisible block to prevent that platforms on the lava at the start of MTZ2 from pulling you through the ground

    Fixed frame-perfect Sonic/Tails sprite corruption and other minor irregularities in WFZ/ending cutscenes

    Fixed 14-Continues cheat causing OOZ music to play for the rest of the game

    Fixed "erratic" behaviour with object's detecting their distance from walls to their left

    Fixed 2P animated art loader accidentally overwriting its own loop counter

    Fixed rings disappearing when near the top of the screen

    Fixed rings not shaking with everything else during things like the HTZ earthquake sequences

    Fixed Tails having flesh-coloured arms in the Special Stages

    Fixed the shoe on the Speed Shoes monitor not having a white stripe on it

    Fixed HTZ seesaws not cancelling the spin dash if you're launched while charging it

    Fixed shield poking through the bottom of the tunnels in EHZ/HTZ

    (Check out 'credits.txt' for a list of guides I used, by the way.)

    Because I want to avoid some issues I've seen in similar hacks, this actually comes in two builds: a 'Pure' one that aims to be just vanilla Sonic 2 with as many fixes as possible (a theoretical REV03, basically), and an 'Impure' one, that has some non-bug-fixing design choices like Super Sonic detransformation and S&K style "slow ducking":
    Made it so you can duck while moving at slight speed, similar to S&K (though unlike S&K this does not change how fast you have to be to roll)

    Removed air speed cap

    Added S3K-style Super transformation, except you have to use alternating buttons, and you can detransform

    Made Tails able to enter Debug Mode

    Download here.
     
    Last edited: Nov 22, 2017
    maple_t, NeoFusionBox, KCEXE and 7 others like this.