OPTCG Sim - Unofficial Practice Tool for the One Piece Card Game

OPTCG Sim

Download the latest version of the sim

Select a platform

Download

Use the main download first. If Dropbox traffic is high, try the Google Drive mirror.

Windows Installation Instructions

Unzip the downloaded file with Winzip/7zip/Winrar/etc.
It’s recommended to move the Sim folder to your Program Files to help the Auto-Patcher work properly.
Run the Sim in Admin mode to prevent most issues from patching or network play.

Troubleshooting Information

General Network Errors:

VPN: VPNs can mess up matchmaking. Alternatively, if you are on a particularly slow connection or live somewhere far from Unity data centers, a VPN could help the connection.

Mobile: Try switching between wi-fi and mobile data.

Windows: Make sure you are running the app in Admin mode. Additionally, Unity requires some machines to have ‘Time Sync’ turned on in their system settings.

Firewalls and various Antivirus programs can also prevent the game from talking on Port 7777.

Network Exception:

If you’re getting Exception errors with Unity Services / Inner Exceptions, try navigating to Users{USER}\AppData\LocalLow\ and Users{USER}\AppData\Local\ and deleting the ‘Batsu’ folders inside those locations.

Missing Fonts (Android):

If you are seeing pink/purple blocks instead of text in the sim, your device does not currently support one of the normal fonts used in the sim (Dela Gothic One, Segoe UI). Check if you’re able to reset your phone’s default fonts or install additional font packs.

Unable to Click (PC):

If you’re unable to click on certain UI options such as the deck selection, make sure that any gaming controllers are unplugged / not interfering with the sim. Take a look at other software such as Razer Synapse which have been known to cause input issues as well

Missing Decks:

If your decks aren’t appearing at all in the ‘Select Deck’ dropdown, try backing them all up to a different folder and deleting them all. There may be a deck that is corrupted causing the full list to fail.

Download

Use the main download first. If Dropbox traffic is high, try the Google Drive mirror.

Mac Installation Instructions

Download using Safari instead of Chrome.
Right-click and Open the RIGHT_CLICK_OPEN_ME_FIRST.command file
Move the unzipped simulator to the Application folder, then launch it from the Finder menu.
- 3a. Alternatively: Right click > show contents > go to MacOs folder and run the OPTCGSim
To fix the “OPTCGSim is damaged” issue, you’ll need to add Read Permissions to the app:
- 4a. Put the Sim into a folder, and that folder into “Applications”
- 4b. Right-Click the folder and click on the “New Terminal at folder”
- 4c. Copy and paste this command into the terminal – don’t run it yet:
  - xattr -r -d com.apple.quarantine
  - (MAKE SURE TO INCLUDE THE SPACE AT THE END)
- 4d. Open the folder where the Sim is in on a new tab and drag and drop the sim into the terminal. That way you get the correct Application Path
- 4e. Run the terminal

Troubleshooting Information

General Network Errors:

VPN: VPNs can mess up matchmaking. Alternatively, if you are on a particularly slow connection or live somewhere far from Unity data centers, a VPN could help the connection.

Mobile: Try switching between wi-fi and mobile data.

Windows: Make sure you are running the app in Admin mode. Additionally, Unity requires some machines to have ‘Time Sync’ turned on in their system settings.

Firewalls and various Antivirus programs can also prevent the game from talking on Port 7777.

Network Exception:

If you’re getting Exception errors with Unity Services / Inner Exceptions, try navigating to Users{USER}\AppData\LocalLow\ and Users{USER}\AppData\Local\ and deleting the ‘Batsu’ folders inside those locations.

Missing Fonts (Android):

If you are seeing pink/purple blocks instead of text in the sim, your device does not currently support one of the normal fonts used in the sim (Dela Gothic One, Segoe UI). Check if you’re able to reset your phone’s default fonts or install additional font packs.

Unable to Click (PC):

If you’re unable to click on certain UI options such as the deck selection, make sure that any gaming controllers are unplugged / not interfering with the sim. Take a look at other software such as Razer Synapse which have been known to cause input issues as well

Missing Decks:

If your decks aren’t appearing at all in the ‘Select Deck’ dropdown, try backing them all up to a different folder and deleting them all. There may be a deck that is corrupted causing the full list to fail.

Download

Use the main download first. If Dropbox traffic is high, try the Google Drive mirror.

Linux Installation Instructions

Unzip the downloaded file
Run OPTCGSim.x86_64
You may need to add ‘executable’ properties to the file:
1. cd to the folder containing the Sim
2. run: chmod +x OPTCGSim.x86_64

Troubleshooting Information

General Network Errors:

VPN: VPNs can mess up matchmaking. Alternatively, if you are on a particularly slow connection or live somewhere far from Unity data centers, a VPN could help the connection.

Mobile: Try switching between wi-fi and mobile data.

Windows: Make sure you are running the app in Admin mode. Additionally, Unity requires some machines to have ‘Time Sync’ turned on in their system settings.

Firewalls and various Antivirus programs can also prevent the game from talking on Port 7777.

Network Exception:

If you’re getting Exception errors with Unity Services / Inner Exceptions, try navigating to Users{USER}\AppData\LocalLow\ and Users{USER}\AppData\Local\ and deleting the ‘Batsu’ folders inside those locations.

Missing Fonts (Android):

If you are seeing pink/purple blocks instead of text in the sim, your device does not currently support one of the normal fonts used in the sim (Dela Gothic One, Segoe UI). Check if you’re able to reset your phone’s default fonts or install additional font packs.

Unable to Click (PC):

If you’re unable to click on certain UI options such as the deck selection, make sure that any gaming controllers are unplugged / not interfering with the sim. Take a look at other software such as Razer Synapse which have been known to cause input issues as well

Missing Decks:

If your decks aren’t appearing at all in the ‘Select Deck’ dropdown, try backing them all up to a different folder and deleting them all. There may be a deck that is corrupted causing the full list to fail.

Download

Use the main download first. If Dropbox traffic is high, try the Google Drive mirror.

Android Installation Instructions

You’ll need to allow unofficial apps on your phone by navigating to Settings > Apps > Menu > Special access > Install unknown apps
Download the _Android.apk version of the sim (Main Download above). If it won’t open on your phone, instead download the _32bAndroid_Compat.apk version (32bit Compatibility Download above)

Troubleshooting Information

General Network Errors:

VPN: VPNs can mess up matchmaking. Alternatively, if you are on a particularly slow connection or live somewhere far from Unity data centers, a VPN could help the connection.

Mobile: Try switching between wi-fi and mobile data.

Windows: Make sure you are running the app in Admin mode. Additionally, Unity requires some machines to have ‘Time Sync’ turned on in their system settings.

Firewalls and various Antivirus programs can also prevent the game from talking on Port 7777.

Network Exception:

If you’re getting Exception errors with Unity Services / Inner Exceptions, try navigating to Users{USER}\AppData\LocalLow\ and Users{USER}\AppData\Local\ and deleting the ‘Batsu’ folders inside those locations.

Missing Fonts (Android):

If you are seeing pink/purple blocks instead of text in the sim, your device does not currently support one of the normal fonts used in the sim (Dela Gothic One, Segoe UI). Check if you’re able to reset your phone’s default fonts or install additional font packs.

Unable to Click (PC):

If you’re unable to click on certain UI options such as the deck selection, make sure that any gaming controllers are unplugged / not interfering with the sim. Take a look at other software such as Razer Synapse which have been known to cause input issues as well

Missing Decks:

If your decks aren’t appearing at all in the ‘Select Deck’ dropdown, try backing them all up to a different folder and deleting them all. There may be a deck that is corrupted causing the full list to fail.

Download

Use the main download first. If Dropbox traffic is high, try the Google Drive mirror.

iOS Installation Instructions

As Apple does not allow unsigned apps to be installed normally onto iOS devices, you’ll need to sideload the app. Some programs such as Scarlet make this easier, but may be unavailable at times. This tutorial video may still work, if not check out this guide , but you’ll likely need to Google a bit.

Troubleshooting Information

General Network Errors:

VPN: VPNs can mess up matchmaking. Alternatively, if you are on a particularly slow connection or live somewhere far from Unity data centers, a VPN could help the connection.

Mobile: Try switching between wi-fi and mobile data.

Windows: Make sure you are running the app in Admin mode. Additionally, Unity requires some machines to have ‘Time Sync’ turned on in their system settings.

Firewalls and various Antivirus programs can also prevent the game from talking on Port 7777.

Network Exception:

If you’re getting Exception errors with Unity Services / Inner Exceptions, try navigating to Users{USER}\AppData\LocalLow\ and Users{USER}\AppData\Local\ and deleting the ‘Batsu’ folders inside those locations.

Missing Fonts (Android):

If you are seeing pink/purple blocks instead of text in the sim, your device does not currently support one of the normal fonts used in the sim (Dela Gothic One, Segoe UI). Check if you’re able to reset your phone’s default fonts or install additional font packs.

Unable to Click (PC):

If you’re unable to click on certain UI options such as the deck selection, make sure that any gaming controllers are unplugged / not interfering with the sim. Take a look at other software such as Razer Synapse which have been known to cause input issues as well

Missing Decks:

If your decks aren’t appearing at all in the ‘Select Deck’ dropdown, try backing them all up to a different folder and deleting them all. There may be a deck that is corrupted causing the full list to fail.

Known Bugs/Issues

Coming soon…

Latest Patch Notes

1.38a Release (ST30)

April 28, 2026

Features

OP Bounty is now integrated into the client – enjoy joining and playing Ranked Matches right from inside the sim!

New Cards

ST-30 has been added
OP16 now has 51 supported cards
P-121 and P-136 through P-149 have been added

Bug Fixes

[Fix] Hide Player Names should now also hide the player names during system connection messages
[Feature] OnAttack search in the Deck Editor should now find V3 cards as well
[Fix] EB02-059 Without You should now be able to play Straw Hat Characters below Cost 5
[Fix] OP05-058 Waste of Human Life should not be optional for trashing hand cards
[Fix] OP05-117 Upper Yard has been updated to V3 to fix various issues
[Fix] OP08-105 Bonney is not proccing when opponent takes their own life through some actions
[Fix] OP12-117 Slam Gibson ignores passive removal prevention
[Fix] OP15-010 Nezumi should be able to attach opponent’s Don as well
[Fix] P-135 is currently Block 1