Project Vapour:

Physics/sim based, 1st person, Steampunk Mech Warrior type affair, set in a late 19th century alternate history Australia. Haven’t nailed down how deep the multiplayer side should go.

The “MacGuffin” is a weird radioactive mineral that forms a crust on contact with some component of the atmosphere that contains all radiation but gets very hot in doing so. This mineral is only found in the centre of mainland Australia.

Getting there is difficult, building railways proves impossible, so steam powered walking machines ending up being the defacto method of transport over the terrain. Many nations and other groups want a piece of the action, much scope for shenanigans of all magnitudes, rewriting of global history, etc…

Maybe, one day.