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Grappler

Look in direction you want to grapple to and press Left click, R to Reel in and Space to return it back.

LClick fire, R reel in, Space return back.
W%S to Heat or cool down,
Tab to print more drones. (They automatically Decouple)
Press 1-4 and Right click to fire short lasers,
Shift to check Logic drone and LControl to Fly to drone core.

Green means nothing, Blue means your grapple is hooked and Red means there is something
at your drone core.

Have fun!!