Recoil/Stance Bug in Ghosts (PC)

[probaddie]

Marvel4 has just discovered the re-emergence in Ghosts of an exploit that existed in Modern Warfare 3 on PC. It allows you to receive the accuracy bonus you'd normally get with LMGs and SRs by going prone or crouching but while remaining upright:



To execute the bug, you simply need to go prone by holding the "Change Stance" key. Then, you raise your stance using one of those same commands. (A command to go prone while already prone will make you stand again.) The game will give you the accuracy bonus when you go down, but will not update your accuracy when you come back up, thus leaving you with the accuracy bonus. The relevant GSC script - taken from Modern Warfare 3 and assumed to still be active in Ghosts - that allows this exploit is here:

stanceRecoilAdjuster()
{
self endon ( "death" );
self endon ( "disconnect" );

self notifyOnPlayerCommand( "adjustedStance", "+stance" );
self notifyOnPlayerCommand( "adjustedStance", "+goStand" );

for ( ;; )
{
self waittill_any( "adjustedStance", "sprint_begin" );

weapClass = getWeaponClass( self GetCurrentPrimaryWeapon() );

if ( weapClass != "weapon_lmg" && weapClass != "weapon_sniper" )
continue;

wait (.5 ); //necessary to ensure proper stance is given and to balance to ensure duck diving isnt a valid tactic

self.stance = self GetStance();

if ( self.stance == "prone" )
{
if ( weapClass == "weapon_lmg" )
self setRecoilScale( 0,40 );
else if ( weapClass == "weapon_sniper" )
self setRecoilScale( 0,60 );
else
self setRecoilScale();
}
else if ( self.stance == "crouch" )
{
if ( weapClass == "weapon_lmg" )
self setRecoilScale( 0,10 );
else if ( weapClass == "weapon_sniper" )
self setRecoilScale( 0,30 );
else
self setRecoilScale();
}
else
{
self setRecoilScale();
}
}
}

The bug is highlighted in red: there need to be specific calls to "notifyOnPlayerCommand" that cover the "+togglecrouch", "toggleprone", "+movedown" and "+prone" commands. In other words, amend the code in red to also contain:

self notifyOnPlayerCommand( "adjustedStance", "+stance" );
self notifyOnPlayerCommand( "adjustedStance", "+goStand" );
self notifyOnPlayerCommand( "adjustedStance", "+togglecrouch" );
self notifyOnPlayerCommand( "adjustedStance", "toggleprone" );
self notifyOnPlayerCommand( "adjustedStance", "+movedown" );
self notifyOnPlayerCommand( "adjustedStance", "+prone" );

Note that, if someone were able to map any of these to a button on a console controller, then the bug could be exploited there, too.

Edit: Fixed a mistake pointed out by Mousey.

[-3055-]

Oh wow. That's crazy. So how good is every LMG in the game for you PC guys?

[pwn3d]

M27 is already very accurate, doesn't really make a lot of difference and I would feel lame if I abuse this, but I tried it, and it works.

[probaddie]

Nov 14, 2013 10:01:20 GMT -5 pwn3d said:

M27 is already very accurate, doesn't really make a lot of difference and I would feel lame if I abuse this, but I tried it, and it works.

If you have a video of that can you post it and I'll link to it in the OP? Marvel4 tried to make one yesterday but ran into technical difficulties.

[-3055-]

On ps3 it makes a pretty significantly noticeable difference in recoil.

[probaddie]

Nov 14, 2013 14:01:28 GMT -5 -3055- said:

On ps3 it makes a pretty significantly noticeable difference in recoil.

Are you referring to just the differences in recoil when in the different positions or were you able to replicate the bug on PS3?

[-3055-]

Different stance recoil. There's no separate button for straight to prone, so I doubt the bug is even possible for console.

[probaddie]

Nov 14, 2013 15:22:44 GMT -5 -3055- said:

Different stance recoil. There's no separate button for straight to prone, so I doubt the bug is even possible for console.

Yeah, that's what I figured. If you can get this to work on a console you're already cheating anyway.