Enemies
The TARTARUS faces four publicly-confirmed categories of enemy as it moves across Earth's warfare landscape.
Categories
Occupied or rogue urban defence systems. Cities' own defences turned hostile, often seized by rival factions.
Human military forces. Traditional armies, navies, and air forces of Earth's nations.
Gigantic monsters and anomalous lifeforms. Non-mechanical threats operating outside the human military structure.
Invasion units from extraterrestrial civilizations. External invading forces with their own tech tree.
Progression Loop
Every enemy category feeds the reverse engineering loop. Defeating an alien unit yields different intel and therefore different potential upgrades than defeating a human fleet, which gives the player a reason to engage each category rather than specialise.