Hello. Throughout my months of playing Halo 5, I’ve created a rather lengthy list of serious complaints and rants I’d love to disclose to 343, but I can’t seem to find a means of contacting them short of just going to their headquarters, and I don’t have the means to do that. So, where can I find their email address?
You should post some of those statements here. As to an actual email, your guess is as good as anybody’s.
I don’t think there’s anywhere that they’ve posted their email address. Try 343’s Twitter and other social media accounts, you might be able to get something out of those.
Note that I said might.
Or you could try messaging the entire list to Unyshek through Xbox Live.
Best of luck man, if you figure it out let us know.
yea, i would love to contact them, but theres no concrete way to contact them
You can mail them a letter.
Keep us in the loop!
Short of writing a letter, PM the 343 staff here at Waypoint. Maybe get lucky PMing the forum team or mods to pass on your request or try your luck on their social media spin wheel 
Hint: the support forums if you have a bug type issue, include a video or steps to reproduce the issue if you can.
Im afraid to say if they had a support number to call them there lines would always be busy! If you know what I mean! lol.
I wish you luck!
Zippy.
Try messaging Unyshek, or posting in the forums, or tweeting them your list, or finding them on Reddit.