Resident Evil 0 Improved Co-op Guide.

Resident Evil 0 is a single player game and was not designed to be played in Co-op but it has 2 controllable characters for most of the game and with these methods the game can be played mostly in co-op with 2 controllers.

The Easy Way

Resident Evil 0 has 2 controllable characters for most of the game (Rebecca and Billy) and with this trainer for PC you can move and shoot with the secondary character using a keyboard or a second gamepad:

Dante and Raz0r Trainer[www.nexusmods.com]

To do that in the trainer just check the option freeze in player 2 control type and select player 1, in player 1 control type select player 2:



But this is still quite limited as the second player can only control the secondary character that can not interact with items and can not open the inventory and even if you use the switch characters button the first player will always control the main character, this can get boring for the second player as there are sections of the game where only one character is controllable and the first player has to always do it but luckily this can be fixed with a workaround I found:

Improved Co-op

First extract and place these fies[drive.google.com] where your re0hd.exe is located, the default Steam installation path of the game is C:\\Program Files (x86)\\Steam\\steamapps\\common\\Resident Evil 0\\.

These files will allow for 2 xinput gamepads to control both characters, if you placed the files correctly you will hear a beep sound when you launch the game via Steam, make sure you set the game to windowed or borderless windowed so you can use the co-op trainer too.

Then you will need to use this app to remap some buttons of your second gamepad: https://www.rewasd.com/

There is a free trial so you do not need to pay.

Once you install rewasd correctly, launch it and click on your second connected gamepad and select switch to xbox 360, this will allow you to remap your second gamepad, remap the left stick of your gamepad to the wasd keyboard keys and the triggers to right shift and space like this:



Also map the controller right stick to the left stick and the shoulder buttons to the triggers like the screenshot shows, then press apply to slot 1. If you are using 2 native xbox one/series controllers in the output device setting select virtual xbox one gamepad instead before clicking apply to slot 1:



Then open the co-op trainer, launch the game and once in-game with 2 characters in the trainer check the option freeze in player 2 control type and select player 1, in player 1 control type select player 2.

Go back to the game window and now the second gamepad should be able to move the secondary character with the left stick and aim and shoot with the triggers (make sure control type is set to D in the game settings) the first gamepad will control the main character the same as normal.

The second gamepad should also be able to open/move the inventory and switch characters with the face buttons, the second gamepad can also control the main character with the right stick and shoot with him using the shoulder buttons, that way either of the 2 players/controllers can control the main character at any time for the sections that require just one controllable character.

Recently completed a playtrough of the game with this method and it was a fun co-op experience even with the camera limitations (the camera only follows the main character).

Tested this method with 2 xbox 360 wireless gamepads and also with 2 xbox series gamepads connected to PC via the wireless adapter.

If your controllers disconnect the input could get messed up, just fully close everything including rewasd if that happens and start again.

Using the skip doors option in the trainer is also recommended for faster load times when using doors.

Credits

Resident Evil 0 HD Remaster Trainer[www.nexusmods.com]

XInput Plus[sites.google.com]

REWASD[www.rewasd.com]

[LilLeafei]

Wondering how to make partner aim up and down, please tell me someone knows? Or knows what the controls are that I can map it too?

[zoombini]

What's the reason for suggesting rewasd over Steam Input?

[lernos]

This is because the game received a small update, while the trainer is no longer in development. To fix this, go to the trainer's page on Nexus, open the Posts tab and read the 18 Apr 2025 post from liln0e (currently the top one).
TLDR:
Press "Win + R", type "steam://open/console", and press Enter
In the Steam console, paste the following command:
download_depot 339340 339342 2661382597135272796
Wait until it says "Depot download complete"
Go to this folder:
[Steam Folder]\steamapps\content\app_339340\depot_339342
Copy the downloaded "re0hd.exe"
Go to your game folder:
[Steam Folder]\steamapps\common\Resident Evil 0
Rename the current "re0hd.exe" (e.g., "re0hd_backup.exe")
Paste the downloaded "re0hd.exe" here
Right-click the game in your Steam Library > Properties
Go to the Updates tab
Set updates to:
Only update this game when I launch it
Optional: You can also put Steam into Offline Mode to avoid updates completely.

[Hash]

i have an issue with RE 0 Trainer it is not working saying wrong game at the top of the window. i have no idea why and everything is not clickable so I cannot press freeze for player 1 and 2. any help?

[Ashley Graham]

Does anyone know how to get the xinput thing to work so me and my sister can both pickup items? please help

[Biscuit]

Little brothers in the 90's stuck playing Tails in Sonic 3 know how this goes.

[Moonlight]

Thanks a bunch friend! Unfortunately, reading that site as well as some other guides online has given me some ideas to try to fix this, and none work. If some kind soul would happen to know why xinput plus refuses to work, id appreciate it greatly. neither installing more of the dll files nor using the loader app that came with it worked (because, again, clicking on the exe literally does nothing at all.) Looking to try to play this with my Ma cuz she's an old resident evil fan and doing this together sounds super fun. Gonna just deal with being second fiddle for now, but any tips would mean the world. Thanks again friends!

[Talos91]

xinput plus site here: https://sites.google.com/site/0dd14lab/xinput-plus

[Moonlight]

hihi friend! think you may be able to link the site or the dependencies for xinput plus? I cant seem to get it to activate when I launch the game and double clicking the exe in folder doesn't open the game at all. thanks a bunch for the guide!

[TheWolfyTrinity]

@XII @Talos91

This might help, as I wanted to stream the game to a friend so we could play together.

We used Parsec as I don't think Steam Remote Play is an option.

We used Discord voice call, and Parsec, to avoid my friend hearing themselves and preserving sound quality for them I used Voicemeeter (Free software) to redirect my default output sound in Windows to "Voicemeeter Input (VB-Audio Voicemeeter VAIO)", then in Voicemeeter I had A1 at (top right) set to my headset for myself, and A2 set as a monitor that wasn't actually being used for speakers on my end.

This allowed me to set the monitor (A2) as my output device in Parsec, so I could turn off echo cancelling to allow my partner to hear my game without quality loss. (Note: Seems RE0 always uses the default device, trying to force it to use a different output doesn't work for me, therefore for myself all other output sounds including browser tabs, music, etc. play too)

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