Ruin Explorer
Legend
Yeah that didn't even make it to Cyberpunk 2020 two years later, let alone Cybergeneration or RED!As I recall--and its been many a year since I used it so I may be misremembering--that the Cool stat plus the special Solo (combatant specialist background) skill was used to resist freezing in combat if you were wounded or certain other results happened. It wasn't sophisticated, but given how rare representing it at all is in games it stood out.
Cyberpunk 2020 has Stun/Shock Saves instead that tended to get overlooked a lot, but they're a bit different - in theory, every time you take even 1 point of damage in 2020, you have to roll 1d10 under your Body Type score (with a penalty to Body Type score based on how wounded you are), or you are out-of-action until you succeed on a save against it. The whole thing is pretty poorly worded and explained. Like to to the point it says you're out for the combat, and THEN, after interrupting itself to mock Hollywood with a little table and some chatter, turns around and says oh actually you can save every round - but doesn't specify if that's at the beginning or end of your turn or anything! It doesn't even actually say "To make this save roll under your Body Type score on 1d10", you have to essentially intuit that by reading the Death Save rules which come AFTER these rules, and which are more clearly written! They don't even use consistent terminology, referring to "Body Type value" in Stun Shock Save, and "Body Type score" in Death Save, even though they must mean the same thing!
I actually quite like stuff like the 2013 approach in a gritty RPG, so long as it applies to NPCs/enemies as well, but it does add an extra thing to keep track of, and some players (fewer than you'd think in my experience, but not zero) really don't like it.