A helicopter courier sim built around one stubborn idea: model the downwash properly and let the consequences write the levels.
A radial pressure field under the rotor disc, sampled by every loose rigidbody in range. Tarpaulins were the first casualty.
Cargo hangs on a real constraint chain, so pendulum motion is emergent and entirely your fault.
Blade-element-lite: enough aerodynamics to punish bad collective, not enough to need a manual.
Addressables on a 400 m ring. Loads ahead of the nose, drops behind the tail.
Playtesters kept blaming the wind. It was never the wind.