Achilles Heel

The character has a crucial weakness in a specific body location. This location must be an exterior location. Possible locations include one ankle, one ear, the character’s nose, one elbow, the back of one knee, and so on.
Type: Major negative.
Effect: Any time an opponent scores a critical hit against the character, the opponent is assumed to have hit the weakened part of the character’s body. In addition to the damage dealt, the character must make a Fortitude save (DC 10 + damage dealt) or be stunned for 1 round.
An opponents who is aware of the character’s Achilles Heel may choose to specifically target that spot by taking a -4 penalty to her attack roll. If the attack hits, it is considered an automatic critical. If the die roll indicates a critical threat and the critical is confirmed, then the critical multiplier for the attack is increased by 1 (for example, a x2 multiplier becomes a x3). The character must also still make a Fortitude save (DC 10 + damage dealt) or be stunned for 1 round. Multiple hits to the weakened area in the same round do not extend the stun effect.
Biotech: Implant, Graft.