Ace Attorney Online


Welcome to Ace Attorney Online, the online case maker !

AAO is the first place to play, create and share adventure games, using gameplay elements from Capcom's Ace Attorney series.

No download, no hassle - just sign up and start writing your own game from your favourite web browser !

Latest news and updates

Development news: AAO is moving, update your bookmarks !

Development news
AAO is moving, update your bookmarks !

Important piece of news : AAO is moving, in more ways than one.

  • The domain will soon disappear.
    But fear not : another domain is already in place - and has been working for years, actually, though I never felt useful to publicise it.
    From now on, please use the address to access Ace Attorney Online. Please update your bookmarks !
    No other consequence from that part : your AAO experience will remain exactly the same on the new address.
  • The physical machine currently running the AAO website has reached end of life and will very soon be retired.
    For this reason, I will be moving AAO to a new server in the next few days.
    Due to my hectic schedule, I cannot exactly tell you when, but expect some downtime by the end of the week (probably on Friday evening or Saturday) when I will take care of the transfer.

Sorry, it's not a big site update as you may have been expecting; nevertheless, it's vital work that I need to do for the site to keep running.
And having been informed of these close deadlines very recently (and being very busy on other matters lately), it's a little complicated for me to plan the transition correctly - I hope it won't be too bumpy a ride...

See you when it's done !

Development news: Second update in a week !

Development news
Second update in a week !

Heh, you didn't expect that so soon, did you ?

Here it is, a new AAO update. It contains the following changes.

New features :
  • Dynamic playtesting from the editor. Clicking the Playtest button in the editor now opens a player that contains your pending, unsaved changes. No need to save the changes every single time you need to test them ! (Unas)
  • New smooth scrolling modes. In addition to the linear transition previously available, you now have other options to adapt the scrolling rate to your needs. (ThePasch)
  • Expression to return player health. Use f:player_health in the expression engine to get the current player health. (Enthalpy)

Bugfixes :
  • Issue brought by latest update where the "Start" button and preloading process would be automatically skipped when loading a save. (Enthalpy)
  • Issue #78 : Fix conversion process for old trials which contained invalid external sprites. (Enthalpy)
  • Issues #154 and #156 : Fix error in the screen preview panel of the editor. (Enthalpy)
  • Issue #129 : Fix some broken aspects of loading game saves, regarding CR Icons, psyche locks and camera positioning. (Enthalpy)
  • Issue #160 : Errors when editing multiple contradictions. (Enthalpy)
  • Only apply style fixer to local stylesheets, to avoid conflicts with browser extensions. (Unas)
Issue numbers reference the AAO issue tracker : ... ine/issues

Regarding the big new feature that is the dynamic playtesting, it's worth noting that this change was made possible by the Diff&Patch engine implemented in the previous update.
First on a technical level because it works by actually sending a diff of all your unsaved changes towards the player; but also from a usability perspective - because the Diff engine also powers the warning when closing the editor with unsaved changes.
Indeed, without this warning, you could easily forget that your changes are unsaved and close everything after playtesting - and you would lose those changes. Thanks to the warning, however, this is no longer the case : the editor knows that your changes are unsaved, and will remind you about it if you try to close it.

I hope you enjoy this update !