
a simple achevement like the enviomentalist that players have to have burn less than 100 coal we would need a way to turn off the built in burner once we have the geo moduels or just dont track whats being burnt inside that burner.
this would make players have to charge up their ship to do each thing in the lava ( or hot rocks if we get that ) it would make power managment a real challange

there is no way to beat the game with less than 100 coal, you will need coal until T2 because that’s when you unlock the SCHEMATIC to unlock the geo-heat-electricity-generator

You could also nit trqck what the front boiler burns