My Technology

So the core system is going to be d100 (percentile)
As I think on this more it is fairly generic setting wise.

So system wise straight up Opposed Die Rolls. Combat be it Physical, Mental, Emotional, Social, etc. will be essentially simultaneous.

So in example a knife fight between two characters, a PC, and an NPC

So both chose to attack, so the player looks down at their Attack score with Knives (Skill level in %) and it is a 50%. So they can make a single 50% attack, x2 25%, x50 1% die rolls, etc. So the target is equal or less than the % score. To keep this simple, a single attack at 50%

The NPC is less skilled, a 35% Knife Skill.

Each rolls, if each hits then damage is rolled, compared at the same time, then a second round will ensue from there.

In cases of ties, then higher (dex equiv score) will decide, then down to PCs go first.

First thoughts there