ΔV: Rings of Saturn
https://store.steampowered.com/app/846030/V_Rings_of_Saturn
A hard sci-fi 2D space mining sim.
“A physics-based mining sim, set in the thickest debris field in Sol. Every action has a reaction, lasers are invisible without a medium, and your thrust is a potent weapon. Find trade, adapt your equipment to your playstyle, hire a crew to help. Unravel the mysteries of the rings, or just get rich.”
Exapunks is a programming puzzle game set in a retrofuturistic cyberpunk world with early '90s aesthetic. The tutorial is in a form of an in-world zine. For me it was very immersive.