How do I play the game? What do I do?

Excellent question! To start, you will want to find either a pre-written case or a case template to create your own case. Next, find players to fill in each position (prosecution, defense, co-defense, judge, witnesses, etc.). Once you have gathered the required players and found a vacant courtroom, you can begin your case!

Still finding it confusing? There are various communities in AO that organize cases regularly; you need only find and watch (or even join) a case to get an idea of how the game works.

Cases can last around 5 to 6 hours.

Is this the famous online casemaker?

We are not to be confused with the similarly named Ace Attorney Online. Whereas AAO only offers pre-scripted cases, AO boasts the ability to do live, off-the-cuff cases in a courtroom drama environment.

I’m missing characters/backgrounds/music! How do I download more content?

Each server may have their own unique content pack that they use. If you look in the server description in the lobby, you can find a link to their downloads to get the pack.

"bass.dll is missing"

This is a known issue with Microsoft Edge: you may be attempting to run the game from the browser cache. You must extract the archive to a folder of your choosing, such as your desktop.

Why is it detected as a virus?

Add an exception to your antivirus. False positives are very common on small software like ours, as most antivirus software these days use a reputation-based system.

I can't connect to the master server!

Check your firewall, or try the newest version of AO.

How do I make my own server so that I can make private cases?

Read the "How to Server" guide.

How do I open ZIP or RAR files?

Please download 7-Zip.

Panic! Nothing works!

Contact us on Discord.


7-Zip Share Icon

We recommend using 7-Zip for extracting .rar and .zip files!

How to Server Guide Share Icon

If you are wanting to start up your own server, we recommend using the how-to server guide.

Contact us on Discord Share Icon

For any other specific queries, the Discord server is always open!

Release Archive Share Icon

Older updates and change logs can be found here.

Technical Manual Share Icon

The official reference for creating custom content.

GitHub Share Icon

Want to follow our development? We’re open source!