I think the game is least rated because of its weight. I'll take on this challenge
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Okay, so.
The weight really hits hard, the game freezes a lot.
The game is compiled of assets that go in together like the inside maps of Garry's mode. A bit chaotic, but that would even be a good feature, if it weren't for the weight. Also, I excpected more destruction from the atomic kit :D
Except all the above, a fun game, honestly!