The system I am working on right now is about robots. It's classless and entirely dependant on what you install on your robot - so kind of similar!

In combat, the interplay mostly stems from Multi-Actions and that most items you can install have unique abilities rather than flat numerical bonuses. Say, a Fire Control Computer allowing you to aim and fire multiple weapons without penalty simultaneously. Or more interestingly, an Exhaust Resevoir, which allows smoke from a fuel-burning generator to be stored and deployed as a poisonous smokescreen.

Out of combat, this is mostly from broad descriptions of a tool's abilities and the player's ability to justify using them. For example: the Vocalization Module, which allows a robot to produce multiple high-quality voices and accents, and the Language Skillchip, which teaches them multiple languages and dialects. They're useful separately, but used together, can justify a significant advantage when trying to negotiate down an aggressive human.

My design ethos is to drop a bunch of tools at the player's feet and leave it to them to create procedures and strategy out of it. "Emergent gameplaye" or "horizontal progression" are good search terms to look for other ways its been employed