Comics set in an uncertain future, in a society ruled by an ineffectual, corrupt, or oppressive regime or by aliens, robots, etc. For comics set in a world or civilization after a catastrophic event (e.g., nuclear war, an alien invasion), sometimes also including the period immediately preceding the event see Apocalyptic comics.
Science fiction comics set in the 19th century that feature steam-powered machinery and related technologies extrapolated from the science of that era.