These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Broken Helix
Game Breaker: The alien weapon, which, not only is overpowered, also has a splash damage. Black Dawn can only be killed using it.
Also the missiles. While not as strong as the alien weapon, it makes the game very easy to beat.