All right, 3.3.0 is out. Report all of your issues with launching the game or the client here and we'll see what can be done. Once a solution is found it'll be added to this post.
Do not report gameplay bugs and balance issues here.
But before you report them, make sure you did everything as http://mentalomega.com/install said.
You need these Red Alert 2 Yuri's Revenge 1.001 files to run.
- gamemd.exe (patched to version 1.001, can't have NPatch or Rock Patch, can't be cracked or 1.000)
Multiplayer version from XWIS won't work anymore as its gamemd.exe is incompatible with Ares.
Do not put 3.3 files to where 3.0 is if you still have 3.0. I recommend uninstalling 3.0.
If you get 'Unable to set video mode' or 'Failed to initialize' errors, set gamemd.exe & Syringe.exe Compatibility Mode to XP SP3.
Also set 'Run as Administrator' for gamemd.exe, Syringe.exe & MentalOmegaClient.exe.
If it doesn't start matches, try rebooting your PC after setting all of these and see if it helps. If rebooting helped, let us know.
If the game does not start anyway, try to launch it, find syringe.log file created in folder with Mental Omega 3.3 and upload it or send to firstname.lastname@example.org
To make custom maps work, add them to /Maps/Custom subfolder and make sure their extension is *.map
Crash when starting a multiplayer game
Happens during loading before the game starts. This can indicate that you are using the modified gamemd.exe from MO 3.0. It has an icon that looks flat, with two colors. If that is the case get an unmodified gamemd.exe version 1.001 (CD version, TFD version or UC from origin).
Indicators: IE at 00683BA7, debug.log ends with
----- Starting scnenario: spawnmap.ini -----
Player Count: x
Exception handler fired!
Exception C0000005 at 00683BA7
Crash when starting a singleplayer game
Crash happens only on some PCs on startup. This is most likely because of a strange hacking technique used by Ares. I've already replaced the code with a version that should work. Will be released once it got tested.
Indicators: Syringe.log stack contains 0x0067D1B4 somewhere at the top.
Launcher reappears without ever starting the game
Gamemd.exe most likely has some compatibility settings enabled: Run as administrator, or Windows XP SP3 compat mode. If the game needs to run as admin (when you get a prompt to confirm on startup), Syringe has to be started with admin rights, too. If the client is run with admin rights, then this will happen automatically. Thus, set the same compat settings on the client.
Indicators: Syringe.log reports success, but running time is very short.
[03:17:27] SyringeDebugger::HandleException: Creating code hooks.
[03:17:31] SyringeDebugger::Run: Done.
[03:17:31] WinMain: SyringeDebugger::Run finished.
[03:17:31] WinMain: Exiting on success.
Original game doesn't launch after just being installed
Try to run the game as administrator once. No need to set the compatibility settings, just use the context menu on ra2md.exe.