I'll say 23rd of October. GTA III was released on the 22nd of October, Vice City was 27th, San Andreas was the 26th and then Liberty City Stories released the 25th Vice City Stories released the 31st (ALL October) for the most part the same week., and of Course IV released the 28th of April. I figure they're going to keep the same pattern. Also with Max Payne releasing this March they're not going to try and interfere with it so I'd say October would be a realistic release month.