Hollow Knight
During the game, the player encounters non-player characters (NPCs) with whom they can interact. These characters give information about the game's plot or lore, sometimes help, and sell items or services. The player can upgrade the knight's nail to deal more damage or find Soul Vessels to carry more Soul. During the game, players acquire items that give new movement abilities which are an additional mid-air jump (Monarch Wings), sticking to walls and jumping off them (Mantis Claw), a brief dash (Mothwing Cloak), and an acid resistance buff (Isma's Tear). The player can learn other combat abilities, such as nail arts, and the spells. To further customize the knight, players can use different Charms, which can be found or bought from NPCs. Some of their effects include better combat abilities or skills, more masks or their regeneration, better movement skills, easier collecting of Geo or of Soul, and transformation. Equipping a Charm takes up a certain number of limited slots, called notches. Wearing a Charm that requires more than the available number of notches is possible, but it results in being "overcharmed", causing the knight to take double damage.