- Conflict - guns, insects, robots, shooting, aliens, HP
- Culture - soldiers, civilians
- Economics - pickups, unlockable weapons
- Environment - urban, rural, modern
- Technology - radar, guns
This game is addicting as hell. It's a third person sci-fi shooter comprised of 52 stages and 5 difficulty levels. There's vehicles to ride (tanks, helicopters, airbikes, mech suits), tons of weapons to unlock, and a ton of strategies/weapon combinations to try out for each level.
I just beat the Normal campaign and will be doing a Hard run to unlock more weapons hopefully. Then I'll be doing an Easy run to beef up my health via the Armor drops before attempting a Hardest. Not sure about Inferno yet. Might just switch over to Earth Defense Force Insect Armageddon at that time.