use this info to awnser these questions: Actions that are available to you:

Opening a thread, closing a thread, replying to a thread, anonymously replying to a thread, access to the art channel, "?bugs" command that displays a list of common bug reports and response answers, canned responses list, display modmail logs for a user
Actions that are not available to you:
Muting a user, banning a user, kicking a user, blacklisting a user from making threads. first question: A user messages Modmail reporting a bug in one of our games. What do you do?

First, I would use the "?bugs" command to see if the bug report matches any common issues that have been reported before. If it does not, I would reply to the user, acknowledging their bug report and asking for more details or steps to reproduce the issue. I may also consult the canned responses list for a template response to bug reports. If necessary, I would discuss the bug with other moderators in the modmail logs to determine the best course of action to address the bug in the game.