Alchemy is a crafting system in Ragnarok Online II that allows players to brew potions that can do a range of effects from recovering HP and SP to damaging enemies. Like Ragnarok Online's Alchemy, only Alchemist players are able to brew potions.
In RO2, Alchemy has no success rates, allowing players to freely brew without worry of wasting their ingredients for nothing. Instead of having to carry manuals, Alchemist players in RO2 simply need to learn a recipe and that recipe will automatically get added to their crafting window for future brewing. Alchemy is required to level up an Alchemist's job level and each recipe rewards different amounts of EXP. Generally the higher level the recipe, the more EXP is given.
Processing recipes in RO2 are recipes that don't require the purchase of vendor products such as bottles and therefore can be produced for free.
Brewing recipes require the purchase of vendor items such as vials and bottles.
In addition to the recipes learned from the Alchemist trainers, Alchemist players can also obtain recipes from monster drops.