Uncharted 2 in a "delicate" difficulty tuning process

Naughty Dog co-president Evan Wells has tweeted that Uncharted 2 is going under a "difficulty tuning" as the game prepares for an autumn release.

"We're doing a playtest of the entire game of Uncharted 2 this weekend to begin our difficulty tuning," said Wells. "It's a very delicate process."

It's exclusive to the PlayStation 3. No exact date yet.