Nah, completely different games.
Stumbled across Alien Breed Impact recently myself. Alien Swarm uses the Source engine while Alien Breed uses Unreal 3 engine? Something like that.
Plus, Alien Breed is more around single-player co-op with only two players.
The buy system is also different, swarm had an unlock system, this one has like some form of shop. Well, I remembered what I could from mind, sorry if any of the information is inaccurate to hell.
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