I have over 1000 of every enemy apart from these two and Guardians. Guardians will be easy especially on Guardian Rush. But I'm pulling my hair out at this. I've been on Overkill Mode for nearly 12 straight hours and hardly ever see these. I have only 200+ of each =( Stupid achievement! Any suggestions? Other than keep playing and end up in mental institution?

There is no trick to it. You just have to grind it and let it take the time it takes. The worst part is that the enemies you need start showing up late in most modes, so you can't even go for a little bit of grinding a day to make it less boring.

The only shortcut I know of is to get really good in defender mode. That one has scarabs right away as the level starts and you will get many more scarab kills per minute than in any other mode, but since it's more of a survival mode it's much harder to kill what you want and it gets pretty frustrating pretty fast.

They really tried their hardest to make this as boring as possible, didn't they? :(

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85 200/200
05 250/250
01 235/235
01 215/215
01 150/200

 DROGTURIST wrote:

There is no trick to it. You just have to grind it and let it take the time it takes. The worst part is that the enemies you need start showing up late in most modes, so you can't even go for a little bit of grinding a day to make it less boring.

The only shortcut I know of is to get really good in defender mode. That one has scarabs right away as the level starts and you will get many more scarab kills per minute than in any other mode, but since it's more of a survival mode it's much harder to kill what you want and it gets pretty frustrating pretty fast.

They really tried their hardest to make this as boring as possible, didn't they? :(

Thanks for helpful but belated reply Drogturist. I did finally manage to get this achievement a while ago. I think it took around 23 hours just for this final achievement! Meh