====== Tiers ======

Some [[:items:]] and [[:weapons:]] have **tiers**, numbered using [[wp>Roman numerals]] to distinguish different types. Different tiers of the same item or weapon have similar overall effects, but have different [[:credit]] values, cooldowns, [[:PWR]] costs, or other properties. Higher-tier items or weapons are generally more powerful than lower tiers, but are not always strict upgrades, and often have higher [[:skill]] level requirements for the agent using them.

The tiered items are [[:items:Accelerator Chips]], [[:items:Buster Chips]], [[:items:Cloaking Rigs]], [[:items:EMP Packs]], [[:items:Paralyzers]], [[:items:Portable Servers]], [[:items:Shock Traps]] and [[:items:Stims]]; the tiered weapons are [[:weapons:Neural Disruptors]], [[:weapons:Thermal Disruptors]] and [[:weapons:Volt Disruptors]].

Different tiers of items and weapons can be found in [[:mainframe devices:Nanofabricators]] depending on the in-game time, with lower tiers available earlier in the campaign and higher tiers available later. Additionally, "tier III" and "tier IV" items and weapons can be found in [[:missions:Security Dispatch]] missions.
===== "Tier IV" items =====

The [[:Contingency Plan]] DLC adds a fourth tier for some items and weapons, which are considerably more powerful versions, but they are much more limited in how often they can be used. Each fourth-tier item or weapon has one charge per mission, which is consumed when the item or weapon is used. Once used, the item or weapon cannot be used again until the charge is replenished at the start of the next mission, or during the same mission by using a [[:items:Charge Pack]].

The fourth-tier items are [[:items:Buster Chip|Buster Chip IV]], [[:items:EMP Pack|EMP Pack IV]], [[:items:Paralyzer|Paralyzer IV]] and [[:items:Stims|Stim IV]]; the fourth-tier weapons are [[:weapons:Neural Disruptor|Neural Disruptor IV]], [[:weapons:Thermal Disruptor|Thermal Disruptor IV]] and [[:weapons:Volt Disruptor|Volt Disruptor IV]].