Honestly, it gets old. It's fun and all, but it feels like I'm doing the same thing over and over and over again, with slight upgrades. Not to mention the main gameplay isn't THAT fun [at first it is, but after 20 plays? no.]
I like the concept of a shooter-defense game where you aren't just some invincible guy with a gun that sprays down mindless drones as they beat up a wall.
I wouldn't call this endless war 5. More like Endless War: Offense :P. I like how you implemented the Defense engine into this though, and it's something new [and fun] 5/5, but I want moar of the original endless war style
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