Lunar Coins

 are a currency found in Risk of Rain 2 that the player can use to purchase lunar items, unlock the survivor, activate Newt Altars, Shrines of Order, and the Lunar Shop Refresher.

Unlike items or the other form of currency, Gold, Lunar Coins will carry over between games.

Obtaining Lunar Coins

 * Any enemy can drop a single Lunar Coin at a rate of 0.5%, but each drop of a Lunar Coin per run halves this chance per-run. Turret kills currently do not drop lunar coins, due to a bug.
 * The equipment has a chance of dropping Lunar Coins.
 * Obliterating at an Obelisk in the Hidden Realm A Moment, Fractured will yield 5 Lunar Coins.
 * Obliterating while holding will instead advance the player to the Hidden Realm A Moment, Whole, where the player must defeat a  for 10 Lunar Coins looted from their backpack in addition to the 5 Lunar Coins from obliterating, for a total of 15 Lunar Coins.
 * Completing the Game by defeating the and escaping successfully will yield 10 Lunar Coins.

Trivia

 * Lunar Coins used to be whole at the start of the Early Access, but were changed later in development along with the icon denoting the amount of coins a player has.