Field Upgrades in Battlefield 2142 are awarded to all members of a squad when they follow attack or defend orders issued by the Commander by either killing enemies, resupplying, healing, or reviving teammates. Field Upgrades allow players to temporarily use previously locked items that are one level higher on their original unlock tree without the need to buy them with credits. Field Upgrades are available to players until they disconnect from the server. If a player unlocks the item which they are currently using as a Field Upgrade, the next unlock will not become available to use as a Field Upgrade until they leave the current server.
Certain unlocks are only available after purchasing Northern Strike, which are on top of all other unlocks in the unlock trees of the core game. Field Upgrades also allow players without Northern Strike to have temporary access to the upgrades that are normally only available in the expansion. Field Upgrades can only be used on ranked servers.
- Main article: Specializations#Battlefield4
Field Upgrades in Battlefield 4 function in a similar manner to Battlefield 2142. Instead of being able to utilize locked items, however, all members of a squad are given access to Specializations.
Three of these specializations are initially locked. As a squad completes various actions, the remaining specializations are unlocked and stack.
- Killing enemies
- Repairing vehicles occupied by squad mates
- Resupplying squad mates
- Healing squad mates
- Spawning on squad mates
- Competing objectives given by the squad leader
- Saving or avenging squad mates from enemies
If every member of a squad is dead or has yet to deploy, the squad loses the use of one specialization each time this occurs. Upstanding upgrades at the end of rounds will be carried over to consecutive matches on that server.
Players have the option to choose which specializations they are rewarded in the customization menu through Upgrade Paths, with eleven paths currently available to choose from.