Upgrade Items (Legacy)

**Upgrade items** are items that are consumed to permanently upgrade your units, increasing their stats. Players must spend coins in order to use their items for upgrades. Items vary from common (+1) to rare {+2} to legendary (+3). Another type of upgrade items are bus attachments, which adds extra durability points to the bus.

Upgrades increase health, damage, and fortune for units, and durability for the bus. The main difference between unit and bus items is that the former is semi-permanent while the latter can have them quickly rearranged at the player's liking.

The player can reset each upgrade level of a unit to use better items by tapping the reset button (two arrows forming a circle) on the top-left corner of the unit UI window. Previously used items and coins spent for that upgrade level won't be refunded. It is also possible to use items of lower rarity to decrease a unit's stats if players wish to do so.

Support items such as Empty Barrel, Medkit, and Turret do not require items in order to upgrade. Jailer and Specops are the only units that do not require them as they automatically upgrade whenever the bus does. As all these units do not use items to upgrade, they lack the option to have their levels resetted.

Upgrade menu on Builder's page.Level reset menu on Chopper's page.
## Item Table

 Rare (+2)
 Legendary (+3)

## Acquiring

There are several ways to acquire items.

All types of items can be found in military cases, which can be acquired in many different ways.

Up to four Items (one of which is free) can be directly purchased from Trader under Daily Deals every 24 hours.

Common and rare unit items can be obtained as a drop in specific missions by either being a possible reward for destroying the barricade, i.e. finishing the level, or from interacting with tappable vehicles with closed doors within the level's background. These vehicles shake on their own from time to time, indicating they can be interacted with. However, these cars sometimes carry an unwanted zombie as well. If players opened a vehicle and fail the mission, the dropped item will not be acquired and the vehicle with the item (and the zombie that it carries) must be tapped again after re-entering the mission. Tappable vehicles won't appear from stage 7 onwards.

Supply Runs is a unique replayable mode present in stages 1 - 7 that allows players to earn unit items. Players must destroy the barricade to earn them and progress to the next section. Each item has a different probability of dropping with higher quality items having a lower chance compared to basic ones. Legendary unit items will not appear as possible rewards until Supply Run is unlocked in stage 5 or 6.

Levels with item rewards have a box icon on their map tile. The amount of boxes displays the number of items on the level and the chances of receiving it upon mission completion.

Common and rare items can also drop during PvP fights from a random defeated enemy unit.

Common and rare items can be acquired from daily gifts 1 and 2.

Legendary unit items can be obtained from legendary cases, as drops during 20+ levels of Corn Farm Event, by crafting via Trader's Military Kit Shop, and by purchasing them from him. Very rarely, a legendary item can be found in a military case.

Leveling up will reward players a predetermined item.

*See level data for more detailed information on player level reward.*

## Gallery

Upgrade menu on Flamethrower's page before update 2.7.0.Level reset menu on Gunslinger's page before update 2.7.0.
## Trivia

* In Dead Ahead: Quarantine, Pills used to be called Tablets.
* After Update 3.6.0 all previously used items were removed and new items including drastically changing perks and stats introduced. The previous ones only affected one of 3 stats of any unit by 1-3 points up to level 13.