Heat Sink
Heat Sink upgrade allows to extend the duration of Volcanic Class explorations, so, as soon as you don't plan to mine lava worlds you can wait to unlock and upgrade it.
Heat Sink Upgrades
Grade E
Currently broken. Upgrade to mine Volcanic Class nodes.
Grade E+
The heat sink in your suit has been restored. Look cool. Feel cool. Used during Volcanic Class exploration.
Grade D
Keep a cool head longer around lava. Used during Volcanic Class exploration.
Grade D+
Improve your heat sink to leak less coolant. Explore longer. Used during Volcanic Class exploration.
Grade C
Cool to the touch! Stay cool for longer. Used during Volcanic Class exploration.
Grade C+
Keep the heat away longer, as long as you make use of your improved heat sink. Used during Volcanic Class exploration.
Grade B
Travel through volcanic areas for a longer time without being baked alive. Used during Volcanic Class exploration.
Grade B+
Keep your cool and last longer in high temperatures. Used during Volcanic Class exploration.
Grade A
Cool down and catch your breath. You've got more time. Used during Volcanic Class exploration.
Grade A+
Looking cool, miner! Survive much longer in volcanic areas. Used during Volcanic Class exploration.
Grade S
Oxygen is at the current Maximum