Knights of the Crystals is a quest-based medieval fantasy game on Facebook where players can choose a job class and embark on quests. Once a quest is accepted by a player, success is determined by the player’s stats and items, and not through direct player action. Some quests may need to be completed multiple times to unlock the next level, and some quests require the purchase of additional items.
Players also collect cards in the game; cards are used to change the player’s job class in the Quest mode, and to participate in Arena battles. Cards can be merged together to create more powerful cards.
The Facebook version of Knights of the Crystals offers players the option of gifting items and gold to friends and to collaborate with them to complete quests.
