Position the Rig: Use LEFT / RIGHT buttons (or A / D) to align your rig directly above the swimming fish.

Melt the Ice: Press and hold DRILL (or W / Space) to cut through the ice layer. Watch the Drill Heat bar so it doesn't overheat!

Catch the Fish: Once a hole in the ice is cleared, press LAUNCH HARPOON (or Enter) to catch the fish and boost your oxygen.