Game mechanics

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Player mechanics

  • AggroAggro determines the distance at which enemies will begin to attack the player.
  • Attack speedAttack speed is handled similar to movement speed: additive bonuses except the cap is at 4 times original speed.
  • Breath meter – When a player's head is under water or honey, a breath meter appears directly above the player, representing the time the player has until they begin drowning.
  • BuffsBuffs are special stats or visual bonuses which are granted to the player after consuming certain items. They last anywhere from 30 seconds to 48 minutes.
  • Critical hit – A critical hit has a small chance of happening every time the player hits an enemy. It deals double the damage of a normal hit.
  • Damage types – Weapons are categorized into different damage types, these are melee, ranged, magic, and summon. Different equipments and consumables provide bonuses for different types of damage.
  • DeathDeath happens when a character's health reaches zero. Items will be dropped depending on character difficulty and server settings in multiplayer. A status message will appear dependent on the cause of death.
  • DebuffsDebuffs are temporary, negative status effects. Unlike buffs, they cannot be canceled for free at any time, and instead require paying the Nurse NPC for cancellation.
  • DefenseDefense is the number that determines how much damage can be absorbed per hit. It is more effective in Expert and Master Mode.
  • Difficulty – A character's difficulty mode is selected during character creation, and only applies to the character being created. The difficulty mode of a character determines what happens upon their death.
  • Fall damageFall damage is the damage a player character sustains upon landing on solid ground after falling a large distance.
  • HealthHealth is the character's life count, represented by a meter of heart icons at the top-right of the screen. Each red heart shown represents 20 health. Each golden heart is 25 health.
  • Inventory – An Inventory is a set of slots where items appear, or can be placed for storage.
  • KnockbackKnockback is a basic mechanic whereby players and enemies are repelled in the opposite direction of an attack.
  • LuckLuck is a mechanic that influences the randomness of various activities.
  • ManaMana is a resource used by the player when using magic weapons and tools. The player's current and maximum mana is shown as a vertical meter of blue stars on the right side of the screen.

Items

  • AutoswingAutoswing is an item property in which a weapon is repeatedly used or activated when the Use / Attack it is held down. Nearly all weapons in 3DSNintendo 3DS version have autoswing.
  • Modifier – A Modifier applies changes to an item's statistics. Weapons and accessories have a chance to have modifiers applied at random when they are crafted, appearing as loot in chests, or dropped by enemies.
  • RarityRarity is usually considered as a measure of how difficult to obtain or how valuable an item is.
  • Use timeUse time is a statistic that applies to weapons, tools and other usable items, which determines the time that must pass after use before the same item or another item can be used again.
  • ValueValue is what is described as the worth in coins of an item. If sold by an NPC, it will also be the price the NPC sells that item for.
  • VelocityVelocity is the speed of a projectile fired from a weapon. It is not to be confused with use time, which is how fast an item can be used (i.e. fast, average, slow).

NPC mechanics

  • AI – The AI (or artificial intelligence) is the behavioral pattern exhibited by an NPC, enemy, or critter. For instance, the Caster AI will always warp, shoot three times, pause for three seconds, and then warp again.
  • NPC spawning – NPCs, enemies, and critters will spawn off-screen and behave according to their AI. The rate at which they are spawned, the maximum number, and the type spawned are all dependent on the time of day, biome, the tile type of the ground, and other factors.
  • NPC drops – Most enemies will drop coins when they are killed, and many also have a chance of dropping items as well. Several town NPCs also have drops.

World

  • Day and night cycle – The day and night cycle refers to the rising and setting of the sun and moon, and the ways this can affect the world.
  • Expert Mode(Desktop, Console and Mobile versions)Expert is a world difficulty setting chosen during world creation. Once the world has been generated, this setting cannot be changed for that world.
  • Master Mode(Desktop, Console and Mobile versions)Master is another world difficulty setting with the same rules as Expert, but generally harder enemy and boss AI and stats.
  • Journey Mode(Desktop, Console and Mobile versions)Journey is another world difficulty setting, where the player has more control over the world (e.g. time, weather, etc.)
  • Lighting mode – The lighting mode determines the way the light from all sources renders in the world. It is set from Terraria's settings menu, in the "video" sub-menu.
  • World sizeWorld size refers to the size of a Terraria world. The sizes available depend on the platform used.
  • Moon phase – The moon moves through a cycle of eight different phases, with the next consecutive phase appearing each night. The current moon phase is indicated by the amount of it that is visible each night.
  • MusicTerraria has over ninety music tracks. Each one will play and loop endlessly while the player is in a specific biome or while certain events are taking place.
  • Spawn – The world spawn point is where players appear in a newly created world or when joining a multiplayer server. For a regular world, the world's spawn point will be on a surface within five tiles of the horizontal center of the world.
  • Evil biome – Each world is generated with either The Crimson or The Corruption. On Desktop version Desktop, Console version Console, and Mobile version Mobile, the player can choose the biome during world creation.
  • RGB(Desktop version)RGB lighting effects are available for supported Razer, Logitech, Corsair and SteelSeries peripherals.