G.I. Joe: Battleground Wiki
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Upgrade Overview[]

Units can pledge themselves towards a single primary unit to improve its skill(s).  Once complete, the secondary(ies) will no longer appear in your list.

  • Primary
    • The primary will have it's skill level increased by 'sacrificing' the cards selected as secondary.
  • Secondary
    • A primary can have up to 8 secondaries at a time, each of which contributes to raising the skill level of the primary.  Once bound to a primary through upgrade, a secondary can no longer be part of a squad, and will not appear in your unit list.

Making an Upgrade[]

  • First select the unit that will become the primary, then select its secondaries.
    • Tap to select/unselect a unit  
    • Tap and hold to view the unit's stats
  • Next, select up to 8 secondary units to use toward increasing the skill level of the primary.  It costs gold for an upgrade.  After the process is complete, the secondary(ies) will no longer appear in your unit list.  Units in a deployed squad can be selected as primary, but not secondary.

Master Skill Levels[]

Rare units earn more skill XP when selected as primary.  Using upgrade from two of the same units provides a further skill XP bonus.


NOTE: Cards selected as secondary are SACRIFICED to increase the skill level of the primary.  They will no longer exist in your deck after the upgrade.

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