List of Co-op / Multiplayer hacks

[NesDraug]

I'm really in to these co-op hacks. So here's a list of hacks that add additional players to Nintendo and Sega games. Feel free to add to the list, I've probably missed a lot of stuff.


- NES co-op / multiplayer hacks ————————

Balloon Fight - 4 players hack
http://www.romhacking.net/hacks/4826/

Battle City - 4 Players Hack
http://www.romhacking.net/hacks/2142/

Battle City - 1-4 Players Hack Addendum
https://www.romhacking.net/hacks/4658/

Battle City Mario (4 players)
https://www.romhacking.net/hacks/4568/

Battletoads 4 players
https://www.romhacking.net/hacks/3441/
http://www.emu-land.net/forum/index.php?topic=77237.0; (for all the levels, you need to donate 15 USD to his patreon)

Battletoads & Double Dragon 4 players
https://www.romhacking.net/hacks/3980/
http://www.emu-land.net/forum/index.php?topic=77237.0;

Bomberman co-op
https://www.romhacking.net/hacks/3335/

CnD2-4pl: Chip n Dale 2 - 4 players  (DEMO)
https://www.romhacking.net/hacks/4883/
http://www.emu-land.net/forum/index.php?topic=77237.0; (for all the levels, you need to donate 15 USD to his patreon)

DuckTales 2 - Two Players Hack
http://www.romhacking.net/hacks/2141/

Final Fantasy III coop 2 player hack
https://www.romhacking.net/hacks/1797/

Flintstones 2 Minigames
http://www.romhacking.net/hacks/4532/

Ice Climber - 4 player hack
https://www.romhacking.net/hacks/4668/

Pipe Plumber - Ice Climber 4 player hack
https://www.romhacking.net/hacks/4744/

Pipe Plumber - Ice Climber 2 player hack
https://www.romhacking.net/hacks/4810/

Mighty Final Fight for 2 players
https://www.romhacking.net/hacks/1277/
(2P is able to control the enemies.)

New Ghostbusters II – 2 players
https://www.romhacking.net/hacks/3619/

P.O.W.: Prisoners of War - Two Players Hack
https://www.romhacking.net/hacks/2140/

Super Popeye
https://www.romhacking.net/hacks/6613/

Super Dodge Ball 4 Player Hack
https://www.romhacking.net/hacks/71/

Super Mario Co-Op Coin Challenge New!
https://www.romhacking.net/hacks/6965/

Super Mario Bros. - Two Players Hack
https://www.romhacking.net/hacks/4180/

Super Mario Bros 1/3
https://www.romhacking.net/forum/index.php?topic=27945.0

Luigi's Chronicles Co-Op 
https://www.romhacking.net/hacks/6810/

Castle in the Sky and Castle in the Sky Co-Op
https://www.romhacking.net/hacks/5280/

Mario's Keep Co-Op 
https://www.romhacking.net/hacks/5903/

Super Mario Bros. CO OP Christmas
http://www.romhacking.net/hacks/5556

Super Mario Bros. Two Drunk Princesses 
https://www.romhacking.net/hacks/4715/

Bill Kill - SMB hack (Control enemies)
http://www.romhacking.net/hacks/4336/

Batman Bros. co-op
https://www.romhacking.net/hacks/4265/
(Hack I made based on the Super Mario Bros. Two Players Hack)

Super Mario Bros. 3 (Control a cheep-cheep)
https://github.com/ErikHK/smb32p

Solbrain/Shatterhand Co-Op (bundled with modded fceux)
https://www.speedrun.com/shatterhand/resources

Tetris Zero
http://www.romhacking.net/hacks/1013/

Tecmo World Cup Soccer NEXT 
https://www.romhacking.net/hacks/2765/

Wrecking Two
https://www.romhacking.net/hacks/3824/

Zelda II: The Adventure of Link
https://www.romhacking.net/hacks/5243/


- SNES ————————

Final Fight SNES (2 Players hack) http://www.baddesthacks.net/forums/viewtopic.php?f=6&t=654 + https://www.romhacking.net/hacks/6356/

Final Fight Guy (J) 2-player Version of  hack with fastrom: https://drive.google.com/file/d/11piE9P5UUt3LfH2iOuY5D8H6vjGFAwTF/view

Secret of Evermore - 2 Player Edition (SNES)
https://www.romhacking.net/hacks/24/

Seiken Densetsu 3 3-player Hack (SNES)
https://www.romhacking.net/hacks/179/

Super Mario World - Two Player Co-Op (SNES) (buggy)
https://www.smwcentral.net/?p=viewthread&t=73559


Super Mario World - Two Player Co-Op (SNES) (GUIDE)
https://www.reddit.com/r/miniSNESmods/comments/7wyeud/how_to_build_a_working_rom_of_the_super_mario/  updated

Super Mario World - Two Player Co-Op (SNES)
https://github.com/rhelmot/smw-coop (source code to the above hack with less bugs) ((requires asar to build))

Super Mario World 2 player hack with stages modified to remove things that are buggy for Luigi: https://www.youtube.com/watch?v=f-n6w8uy4wE

Super Mario World - 2 Player Co-op Quest (SNES)
https://www.smwcentral.net/?p=section&a=details&id=5559
(2P is able to control the enemies.)

Super Mario World - 2 Player Co-op Quest 2 (SNES)
https://www.smwcentral.net/?p=section&a=details&id=6593
(2P is able to control the enemies.)



- N64 ————————

Jet Force Gemini Trainer and Co-Op Hack
http://www.romhacking.net/hacks/711/

Legend of Zelda OoT: Four Swords Arena Edition (N64)
https://www.youtube.com/watch?v=FDdjPfhYrBM

Legend of Zelda OoT: 2 and 4 Player (N64)
https://www.youtube.com/watch?v=9JL_3VVxpYc

SM64 Split Screen  Multiplayer (N64)
https://www.youtube.com/watch?v=qR1cLfKLMp4
http://origami64.net/showthread.php?tid=41 (dead link?)

Pikmin 2 - Multiplayer Edition    [glow=red,2,300]Added[/glow]
Download: https://mega.nz/file/GBM2UQzJ#4FElBg5GuSz3yXPrE3hJ_TxBrwkOZ_ykVfjXcQ6uyeU
Discord: https://discord.gg/WHSaSS5





- SEGA MEGA DRIVE  ———————— 
Sonic Classic Heroes (SEGA MD)
https://info.sonicretro.org/Sonic_Classic_Heroes

Almost finished Sonic 1 CO-OP hack (SEGA MD)
https://www.youtube.com/watch?v=GaTgI_cIvms

Almost finished Sonic 3 CO-OP hack (SEGA MD)
https://www.youtube.com/watch?v=N_gAMy2NIQk



Bonus:
Super Mario Bros Co-Op - Glitch World
https://www.dropbox.com/s/cq21p963nmsuc3j/Super%20Mario%20Bros.%20Co-Op%20-%20Glitch%20World.ips.zip?dl=1
This is just a hilarious mistake from when I tried to mod the Two Player Hack of SMB1. Play co-op as Mario and Luigi in random levels with strange glitches such as walking through walls. Have that reset button prepared tho. Some levels are impossible to beat due to the randomness of this mistake of a hack.

[Mugi]

not really a hack per-se but if my memory serves me, FF9 on ps1 has natively support for 2 players (decide controller for characters in combat.) i always thought it was pretty cool since it's not really the kind of game you'd think of playing with 2 people.

[#]

not really a hack per-se but if my memory serves me, FF9 on ps1 has natively support for 2 players (decide controller for characters in combat.) i always thought it was pretty cool since it's not really the kind of game you'd think of playing with 2 people.

I don't know about FF9, but FF IV definitely does have that option (on PS1). And there are hacks to add this to FF III: http://www.romhacking.net/hacks/1797/ and FF V: http://www.romhacking.net/hacks/2122/.

Nice to see this get some attention. I really love these hacks as well and I will create some myself too. I'll make a personal projects topic once I've made some progress.

BTW: Secret of Evermore is in the NES section.

[Psyklax]

This is a great idea. I didn't even know anyone had done a 2 player mod before, let alone a dozen or so. I'm actually curious to know what steps were taken to achieve some of these. I should investigate and think about doing one myself.

But anyone who suggests Final Fight SNES can GTFO, just play the Sega CD or arcade versions.

[#]

But anyone who suggests Final Fight SNES can GTFO, just play the Sega CD or arcade versions.

That's very insensitive towards the SNES gamers who really want to play Final Fight on their console in multiplayer. Not everyone is interested in playing on PC, obtaining another version or getting new hardware.

[Psyklax]

That's very insensitive towards the SNES gamers who really want to play Final Fight on their console in multiplayer. Not everyone is interested in playing on PC, obtaining another version or getting new hardware.

1. My PC is plugged into my TV, so it makes little difference to me.
2. Obtaining? You mean finding a second-hand physical copy? If that's the case, what use is a patch?
3. The SNES came out almost 30 years ago, I think you'll be okay getting some new hardware.

Hey, if someone else wants to do it then be my guest, but I'd rather do something more unique.

[#]

1. My PC is plugged into my TV, so it makes little difference to me.
2. Obtaining? You mean finding a second-hand physical copy? If that's the case, what use is a patch?
3. The SNES came out almost 30 years ago, I think you'll be okay getting some new hardware.

Hey, if someone else wants to do it then be my guest, but I'd rather do something more unique.

1. It's not about you(r TV), but those other gamers who like to play on an actual SNES (Classic).
2. The point is that not everyone will be interested in getting another version. They'd rather see a rom hack for the version they own. Despite its shortcomings compared some of the other versions, Final Fight SNES is well-loved.
3. Just because you have access to newer hardware doesn't mean that you have the hardware you can or want to play a certain game on.

[NesDraug]

'll make a personal projects topic once I've made some progress.

Cool. I'd love to see it.

BTW: Secret of Evermore is in the NES section.

Thanks, fixed it!

[Jorpho]

Wasn't there a two-player hack for SM64?  Or was that never finished?  (Or maybe I'm thinking of Galaxy?)

[vergil2012]

So we can count this as well?

http://www.romhacking.net/hacks/1797/

[#]

Wasn't there a two-player hack for SM64?  Or was that never finished?  (Or maybe I'm thinking of Galaxy?)

It's in the first post.

So we can count this as well?

http://www.romhacking.net/hacks/1797/

I already mentioned that and the FF V one.

[vergil2012]

I already mentioned that and the FF V one.

You're right. I overlooked it. Sorry.

[NesDraug]

Any news on smb2 or smb3 co op?

[#]

Any news on smb2 or smb3 co op?

There is this: http://www.romhacking.net/forum/index.php?topic=28170

Not the kind of co-op I'd be interested in, but it's something.

[NesDraug]

I added: Super Mario Bros. 3 (Player two controls a Cheep Cheep)
https://github.com/ErikHK/smb32p

[8.bit.fan]

Awesome list thank you!! 

...surprised no one's done one for Double Dragon(NES) yet...

[NesDraug]

Added Battle City Mario to the list.
https://www.romhacking.net/hacks/4568/

[#]

I recently found this hack: http://www.romhacking.net/hacks/4336/

I haven't tried it yet, but it seems like a decent alternative multiplayer hack.

[IAmCaptPlanet]

there is a hack that lets you play Story mode in co-op splitscreen on Jet Force Gemini

http://www.romhacking.net/hacks/711/

it is a little cumbersome to set up, and is NOT just a simple patch tho

ps: i love this list, maybe co-op centered hacks should have their own searchable category, (not just "improvement")

[NesDraug]

Added the 4 player hack of Ice Climber.