- Halo 2 Rookie
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- Exalted Mythic Member
Survival modes are not a new concept. Gears of War, Halo, and Left 4 Dead -- another game that has it -- are not inventors of a wonderful new idea.
That being said, you are correct in regards to similarity: firefight is a lot like I hear horde is (don't play Gears of War). Waves of enemies that you have to fight against seemingly without end (in Halo's case, actually without end).
So I wouldn't say "FireFight=Horde," I'd say "FireFight~Horde." 'Cause they're both survival.