User blog comment:KillHil/Got Questions for Gearbox about Borderlands 2?/@comment-4230663-20120318233223/@comment-2207030-20120319041143

The Sirens Phasewalk could allow you to go invisible for a time and sneak up on an enemy to attack from behind. Worked better in co-op, but still worked. The Hunter was never really a stealth character. He is more of a big game hunter/ Pirate ( hence Bloodwing and his looting skills) than a Ninja IMO. The new Assassin Class seems more along the lines of stealth for BL 2 from the articles i have read.