According to Guerrilla Games QA Manager Seb Downie, the "Lean and Peak" system seen in Killzone 2’s single player campaign will not be present in the game's multiplayer mode.
"It didn't work too well in the 360 degree combat environment that is multiplayer," wrote Downie on the Official PlayStation forums. "In single player the path is more linear and the action is usually ahead of the player. In MP levels are more arena based and you are more susceptible to flanking and being attacked from various angles."
Downie continued to explain how in multiplayer, the developer found that players were actually working against the "lean and peak" system, and concluded it was simply best to remove it altogether.
"We found that the L&P system didn't add anything in that scenario and that players often actually took a step back from cover objects to give themselves a little more freedom to move, so they were actually working against the system, so we ripped it back out," wrote Downie.
"Crouching was deemed sufficient."
Killzone 2 is due for release in February 2009.