Editing a 'Rabbids Land' Savegame...

Duamutef_MC · May 25, 2022

I would like to edit a Rabbids Land savegame - it comes in a format called 'guc' and - upon opening it - looks like a lot of gibberish:

E~|É5 æ 4 ÿÿÿÿ 8 mb_TrackingAccepted #.kuÀ>ìˆ.ksð803Â.™½@ %Ë d mai_UnlockedCollectible @„ÿsºªºº„ÿ{ªªªª„ÿsºªºº„ÿ{ªªªª mi_TotalCollectibles lT·E¿‹Ÿ?4hˆ¾ €¿KÌ9<6?¼Ë3¿á ˆ> X mai_VideoStatus #ÙÕØ6zÍHÙÕØ›À£Õ6zÔà ‹3ÿz½ÿ mb_MusicTheaterIsNew 31-CH mf_ScreenSetting_Scale äË P ð ÿ mf_ScreenSetting_CentreX ‹â=¤€²JÓ*8Ó*8ÿÿÿÿÿÿÿÿ¡¬ Àkê mf_ScreenSetting_CentreY Ër}ññòð qò]p±
|ä p
MO† mi_NumBoardgameSessionsPlayed £ l mb_WasLinkedToUPlay 3
4eP ÿÿ6² È8ýà81(À mab_UPlayRewardUnlocked 87*p!qçp!qùh # 8j@WÂ‰Ž mab_UPlayActionDoneServerSide # mab_UPlayActionDoneLocal #ZÐ€ € '” ‚S # mab_UPlayPopupShown #81{(8-tÈ5Ý¦9À‡ 81X [ / d mastt_MiniGameStatus £?€ >ÌÌÎ / ˜ mastt_FamilyStatus ®‹ /
mastt_Profiles 6ó{x T„ #ÙÕØ2ŽãðÙÕØ0ú² mi_ProfilesCount #˜ä€ À ?Ôxd ?€ ? ? D i e g o P a p i t o C h i c k y P e p p e r

Those funny names at the end are the name of the Rabbids!

Contrary to what was said here ("Uplay rewards are server sided!") - every reward is actually within the savefile. I just need to understand how to convert the savefile into a readable/editable status.

Anybody with any idea?

PS: The smartasses that said this could not be done need not apply, you've been wrong on pretty much everything you said.

Exotical · May 25, 2022

Duamutef_MC said:
I would like to edit a Rabbids Land savegame - it comes in a format called 'guc' and - upon opening it - looks like a lot of gibberish:

E~|É5 æ 4 ÿÿÿÿ 8 mb_TrackingAccepted #.kuÀ>ìˆ.ksð803Â.™½@ %Ë d mai_UnlockedCollectible @„ÿsºªºº„ÿ{ªªªª„ÿsºªºº„ÿ{ªªªª mi_TotalCollectibles lT·E¿‹Ÿ?4hˆ¾ €¿KÌ9<6?¼Ë3¿á ˆ> X mai_VideoStatus #ÙÕØ6zÍHÙÕØ›À£Õ6zÔà ‹3ÿz½ÿ mb_MusicTheaterIsNew 31-CH mf_ScreenSetting_Scale äË P ð ÿ mf_ScreenSetting_CentreX ‹â=¤€²JÓ*8Ó*8ÿÿÿÿÿÿÿÿ¡¬ Àkê mf_ScreenSetting_CentreY Ër}ññòð qò]p±
|ä p
MO† mi_NumBoardgameSessionsPlayed £ l mb_WasLinkedToUPlay 3
4eP ÿÿ6² È8ýà81(À mab_UPlayRewardUnlocked 87*p!qçp!qùh # 8j@WÂ‰Ž mab_UPlayActionDoneServerSide # mab_UPlayActionDoneLocal #ZÐ€ € '” ‚S # mab_UPlayPopupShown #81{(8-tÈ5Ý¦9À‡ 81X [ / d mastt_MiniGameStatus £?€ >ÌÌÎ / ˜ mastt_FamilyStatus ®‹ /
mastt_Profiles 6ó{x T„ #ÙÕØ2ŽãðÙÕØ0ú² mi_ProfilesCount #˜ä€ À ?Ôxd ?€ ? ? D i e g o P a p i t o C h i c k y P e p p e r

Those funny names at the end are the name of the Rabbids!

Contrary to what was said here ("Uplay rewards are server sided!") - every reward is actually within the savefile. I just need to understand how to convert the savefile into a readable/editable status.

Anybody with any idea?

PS: The smartasses that said this could not be done need not apply, you've been wrong on pretty much everything you said.

I'm pretty sure alot of the gibberish is because you're opening a file that's not a .txt or .bat file.

V10lator · May 26, 2022

Duamutef_MC said:
I just need to understand how to convert the savefile into a readable/editable status.

This is a file containig bits and bytes, you can't just open it with Notepad. This file isn't meaned to be readable by humans... You need to basically think like a machine... A bit of help:
https://en.wikipedia.org/wiki/Hex_editor
https://en.wikipedia.org/wiki/Reverse_engineering
... Really, you need to study computer science for this... Or hope that someone somewhere on the planed reverse engineered the file structure already and programmed an easy to use editor for exactly this purpose but it doesn't look like that.

MikaDubbz · May 26, 2022

So many threads just to get a Grey colored Rabbid in one of the worst Rabbids games (not a high bar to begin with). I wish you luck, but personally I'd just get my kid a better party game on the Wii U instead, and they'd forget all about this dud of a game, lord knows the party game genre is one of the genres the Wii U really excelled at.

Duamutef_MC · May 26, 2022

MikaDubbz said:
So many threads just to get a Grey colored Rabbid in one of the worst Rabbids games (not a high bar to begin with). I wish you luck, but personally I'd just get my kid a better party game on the Wii U instead, and they'd forget all about this dud of a game, lord knows the party game genre is one of the genres the Wii U really excelled at.

If you only knew. I tried every party game known to man (others are vastly superior) but my child mentions "grey rabbid" every few hours. It's just me trying to surprise him. If you're a dad you'll understand.

Duamutef_MC · May 26, 2022

V10lator said:
This is a file containig bits and bytes, you can't just open it with Notepad. This file isn't meaned to be readable by humans... You need to basically think like a machine... A bit of help:
https://en.wikipedia.org/wiki/Hex_editor
https://en.wikipedia.org/wiki/Reverse_engineering
... Really, you need to study computer science for this... Or hope that someone somewhere on the planed reverse engineered the file structure already and programmed an easy to use editor for exactly this purpose but it doesn't look like that.

I tried to process it as several binary formats but it is encoding data in its own way. It looks also quite redundant - all that information could have fit a decidedly smaller file.

V10lator · May 26, 2022

Duamutef_MC said:
I tried to process it as several binary formats but it is encoding data in its own way.

Which is basically what I said above. You do such files by just writing out a RAM area (C struct) holding all the bits and bytes ( https://www.geeksforgeeks.org/readwrite-structure-file-c/ ). This is damn fast to read and write for a computer (no need to process the data in any way: Read the file to RAM and there's all your bits and bites just like you expect them) but makes it a unique binary representation you can't just open with Notepad or some other tool. You need use a hex editor.

BTW: There's one thing I forgot: The save file looks relative small, so you could open it with a hex editor, flip one bit, test it, if it didn't work flip the next one and so on... Might take a few days or even weeks and in the worst case might not work at all but I fail to see other options.

//EDIT: The hex editor is showing you the raw bits and bytes in the file. It doesn't show them as zeros and ones through but in a hexadecimal representation. While decimal goes from 0 to 9 hexadecimal goes from 0 to F. So let's say the hex editor shows 3A this would be 58 in decimal 00111010 in binary. So it's representing one byte. You want to flip the first bit of this byte? then change the A to B, so it gets 3B / 59 / 00111011. Flipping the second bit? You need to do -2 for that, so 38 / 56 / 00111000. Why to flip the bits like this? Well, look at this:

Binary	Hexadecimal	Decimal
00000001	01	1
00000010	02	2

Now 3 is 2 + 1, right? So it continues like this:

00000011	03	3
00000100	04	4
00000101	05	5
00000110	06	6
00000111	07	7

In other words: It's simple math, you just have to understand two new numbering systems (binary and hexadecimal).

//EDIT²: This table should really help you:

Binary	Hexadecimal	Decimal
00000001	01	1
00000010	02	2
00000100	04	4
00001000	08	8
00010000	10	16
00100000	20	32
01000000	40	64
10000000	80	128

Lostbhoy · May 26, 2022

Just throwing it out there, may have already been mentioned but is modding the existing characters textures an option?

I'm unfamiliar with the game files but I'd imagine that taking out an existing Rabbid and then repacking as a grey colour it would be a lot simpler and less time consuming. Can't imagine it's any different from modding Mario Kart textures, at a guess!

V10lator · May 26, 2022

I just found some website describing binary internals of the game! This website has a Discord server, so if anyone knows enough about the game to tell you which bit to flip exactly it might be one of the people here: https://discord.com/invite/SGeE8dcWR6

//EDIT: This is the website I'm talking about: https://tcrf.net/Rabbids_Land

Duamutef_MC · May 26, 2022

V10lator said:
I just found some website describing binary internals of the game! This website has a Discord server, so if anyone knows enough about the game to tell you which bit to flip exactly it might be one of the people here: https://discord.com/invite/SGeE8dcWR6

//EDIT: This is the website I'm talking about: https://tcrf.net/Rabbids_Land

Thanks mate. I've contacted them in their forum already. Let's see what comes out of this. It's becoming some sort of hobby, really.

V10lator · May 26, 2022

I fired up Ghidra and there's cleary a cheat engine: The main menu calls GameMgr_Cheat_Update each frame which for itself checks for button presses untill a valid cheat sequence is found (by fist calling GameMgr_Cheat_CheckNextButton, then GameMgr_Cheat_BufferContainsValidSequence and if that returns true it finally executes GameMgr_Cheat_ExecuteCheatForValidSequence).

I needed 1.5 hours to figure this out now but I still don't get where to find these cheat sequences and how to translate them into buttons.

Duamutef_MC · May 26, 2022

V10lator said:
I fired up Ghidra and there's cleary a cheat engine: The main menu calls GameMgr_Cheat_Update each frame which for itself checks for button presses untill a valid cheat sequence is found (by fist calling GameMgr_Cheat_CheckNextButton, then GameMgr_Cheat_BufferContainsValidSequence and if that returns true it finally executes GameMgr_Cheat_ExecuteCheatForValidSequence).

I needed 1.5 hours to figure this out now but I still don't get where to find these cheat sequences and how to translate them into buttons.

You can use the Konami code in the main menu. It unblocks all mini games and cutscenes. But rewards (the grey rabbid, soundtrack, etc.) remain sealed.

Editing a 'Rabbids Land' Savegame...

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