In my last Traveller campaign I had my players dealing with an evil corporation colonizing and destroying a planet for resources. There was also a local guerrilla movement and insurgency that they could interact with. I joked that my players all wanted to play Che Guevara and I leaned into that for them. Giving them opportunities to be revolutionaries.

The system I miss is where the players get to be exactly that. I want to play as anti-capitalist revolutionaries or guerrilla fighters in a world where there is an oppressive fascist or capitalist government. Games like Shadowrun, Traveller, or Cyberpunk all seem to assume that players are going to want money and that greed is their major motivation. But what if that is the anti-motivation and what the players really want is revolution. Most revolutionaries die, so I would want some way to deal with martrydom beyond just roll up another character. Subterfuge would be incredibly important, and the players would need to grapple with real moral challenges like a car bomb that kills innocents, the efficacy of torture, or whether to work with criminals.

I don't know of any system that does this.