During a Japanese autograph tour Metal Gear Solid creator, Hideo Kojima, spoke about the number of players that have tried the online version of the stealth action franchise.
According to Hideo, "domestically, the one-day peak time is 11pm with 12,000 players playing online simultaneously. Worldwide, we've seen about 100,000 connect [to MGO]."
Domestically, of course, means Japan and 12,000 is a decent number for a Japanese online game.
Famitsu also confirmed that Metal Gear Online will be released as a standalone product in Japan on July 17th for $17.