Sprocket

Sprocket is a niche but deeply detailed tank designer that lets you engineer a vehicle from scratch and then take it into realistic combat scenarios. The hull and turret shape design is fully malleable — drag faces and edges to reshape the geometry, balancing internal volume against external surface area to be armored, and use angled shapes that may bounce incoming shells off entirely rather than absorbing them.

Every internal system can be designed individually. Set armour plate thicknesses across the surface. Build a cannon that can punch through enemy armour, with enough rotational space and force, plus storage for ammunition. Place crew (humans are light but large and quite essential, the game notes drily) and assign them roles, with cramped and overworked crew performing worse than spacious well-rested ones. Design engines from ship-sized down to lawnmower-grade, fuel tanks with chosen capacity and location (even external if you don't mind them being shot off), and transmissions with gear ratios that fit your tactical intent.

Attached parts are functional, not just decorative. The engine ends up wherever you put the exhausts and vents; if a shell pierces your armour and hits that section, the engine takes the hit. Place a fuel port in front of the driver and the fuel tank might absorb a projectile that would otherwise kill them — assuming the fuel doesn't ignite. Track and suspension design lets you focus on trench-crossing, mountain-climbing, top speed or pure aesthetics.

Combat is realistic without abstracting health into hit-points. Vehicles fight as long as their critical internals function. Engines, transmissions and tracks all simulate together to give the tank a feel close to the real thing. Scenarios span WW1, the interwar period, and the early, mid and late stages of WW2 — historically progressing combat that exposes how design constraints shifted across the era. Players note there's no dedicated tutorial yet, so this is recommended primarily for people who enjoy figuring things out or already know about tanks.