Item
There are a large number of items in Arknights with various uses depending on their type listed below.
All non-exclusive items are separated into six tiers denoted by the background it overlaids with as shown below, with higher tier ones being more difficult to obtain than lower tier ones, although certain items did not use the background.
| Tier 1 | Tier 2 | Tier 3 | Tier 4 | Tier 5 | Tier 6 |
|---|---|---|---|---|---|
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Battle Records
Battle Records give EXP to Operators at the cost of 
LMD that scales on the Operator's level and promotion; the higher the Operator's level and/or promotion, the more expensive it is for them to use Battle Records; see EXP (Operator) for more information.
Tactical Drill operations are the most efficient place to obtain Battle Records.
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Materials
- Main article: Item/Materials
Tokens
Tokens are used to raise the Potential of Operators.
Class
Four Class Tokens of the corresponding class can be used to raise Operators' Potential by one level.
Class Tokens can be purchased in the Distinctions Store and Purchase Certificate Store, and are awarded in certain events.
| Replicated |         |
|---|---|
| Original |         |
| Antique |         |
| Rare |         |
| Epic |         |
| Royal |         |
Despite being present in the game, Replicated, Original, and Antique Class Tokens are unobtainable.
Operator
- Main article: Operator Token
Currencies
Currencies are used to purchase items in various stores with the following exceptions:
- LMD is used to train/promote Operators and process materials at the Workshop.
- Originite Prime can be exchanged for Orundum, which is used for headhunting.
- Information Fragments are used to unlock minor event interludes at the Archives.
- Event Crystals are used to unlock past major events' operations at the Terminal.
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Event items
- Main article: Item/Event
Mode-specific items
- For the list of items in Integrated Strategies, see Item/Integrated Strategies.
- For the list of items in Reclamation Algorithm, see Item/Reclamation Algorithm.
Roster items
These items are used to add Operators into the player's roster through headhunting and recruitment.
| Headhunting |   |
|---|---|
| Recruitment |   |
- For a list of Ten-roll Headhunting Permits exclusive to limited headhunting banners, see Ten-roll Headhunting Permit/Limited.
Other roster items
- Type-α Headhunting Permit
- Type-β Headhunting Permit
- Type-γ Headhunting Permit
- Top Operator Transfer Permit
- Senior Operator Transfer Permit
- Operator Voucher
- Preregister to get 1 of 4 Operators randomly
Consumables
Consumables are single-use items.
Sanity restoration
Also known as sanity potions, these consumables are used to restore the player's 
Sanity and will expire after a certain period if not used up.
| Regular |      |
|---|---|
| Special |                     |
| Unique |           |
Operation Supplies
- Main article: Operation Supplies
Event consumables
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Other consumables
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Abstract
Abstract concepts that exist as items in the game.
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