I'm sure you've all seen this at one point. You take an agent, load him up with the stun grapple, and run at the nearest arthropod. You zap him and zap him and zap him but nothing happens. Finally a stray bullet goes his way and you see the familiar electric blue outline of a shield. Your stun grapple kept hitting but it did nothing! The failure of the Stun Grapple defies two rules established in Apocalypse: 1) Things that bypass shields have full effect on the target. (psionics, stun grenades, AG gas, toxigun) 2) Things that strike shields show the bubble animation and deal damage to the shield. (literally anything else except the solitary stun grapple) The stun grapple does neither. It both deals no damage to shields, and is interrupted by them without showing an animation. I suspect this is a bug. This bug may be due to how damage modifiers work in Apoc. The Stun Grapple is listed as dealing zero damage to shields. This is likely meant to represent the weapon ignoring the effect of shields, in the exact same way that AG gas or stun gas (or the never included psionic blast) deals zero damage to shields. It is possible that the "ignore shield" flag was never actually set and made it through testing. There are two possible solutions to this problem. They depend on what you think a stun grapple should do. A) Stun Grapples should ignore shields as graphically depicted, and deal full stun effect like any weapon that ignores shields. B) Stun Grapples should be interrupted by shields as mechanically depicted. They should deal appropriate damage when zapping the shield like any other weapon. I don't know about you, but stun grapples are not my first choice for capturing aliens. I opt to use stun gas until half of the city is knocked unconscious and Sanctuary Clinic suffers an epidemic of retarded babies. I pick option A because I know that grapples are more difficult to use for capture, and it's okay to let players risk their agents for another precious shield.