But if I recall some GM manuals have rules describing certain injuries. The first edition of the Star Wars d20 System Core Rulebook (from the year 2000) had a sidebar on the page about injury and death, which explained the skillsrolls were affected by injury to specific body parts.:
| Body part | Rolls affected |
|===========|====================================================================|
| Head | All attack rolls, save and checks |
|-----------|--------------------------------------------------------------------|
| Eye | Appraise, Craft, Demolitions, Disable Device, Forgery, Pilot, |
| | Repair, Search, Sense Motive, Spot and Survival checks, initiative |
| | rolls, Dexterity checks, Reflex saving throws. |
|-----------|--------------------------------------------------------------------|
| Ear | Diplomacy, Listen and Sense Motive checks, Initiative rolls |
|-----------|--------------------------------------------------------------------|
| Hand | Climb, Computer Use, Craft, Demolitions, Disable Device, Escape |
| | Artist, Forgery, Pilot, Repair, Sleight of Hand, and Treat Injury |
| | checks, attack rolls. |
|-----------|--------------------------------------------------------------------|
| Arm | Climb and Swim checks, attack rolls, Strength checks |
|-----------|--------------------------------------------------------------------|
| Foot/Leg | Climb, Jump, Move Silently, Ride, Swim and Tumble checks, Dexterity|
| | checks, Reflex saving throws; reduce speed by 2 meters |
|-----------|--------------------------------------------------------------------|