Antifreeze
Antifreeze upgrade allows to extend the duration of Arctic Class explorations, so, as soon as you don't plan to mine ice worlds you can wait to unlock and upgrade it.
Antifreeze Upgrades
Grade E
Currently broken. Upgrade to mine Arctic Class nodes.
Grade E+
Your antifreeze component has been repaired. Used during Arctic Class exploration.
Grade D
Stay nice and toasty longer. Used during Arctic Class exploration.
Grade D+
Your antifreeze stays on for a bit longer to increase your survivability. Used during Arctic Class exploration.
Grade C
A warm miner is a happy miner! Stay warmer for longer. Used during Arctic Class exploration.
Grade C+
Is it a bit warm? Oh, it's just you. And your antifreeze, which can now stay on longer. Used during Arctic Class exploration.
Grade B
Improved your antifreeze to keep you going long enough to collect more loot. Used during Arctic Class exploration.
Grade B+
Stay warm, loot more, explore more. Used during Arctic Class exploration.
Grade A
Your antifreeze works much more efficiently. Brave the cold even longer. Used during Arctic Class exploration.
Grade A+
The cold never bothered you anyway. Keep yourself warmer for a extended period. Used during Arctic Class exploration.
Grade S
Antifreeze is at the current Maximum