Repository

 is a Tier 5 Tank that upgrades from Silo, Contender, Cateran and Flank Gatling at level 60.

Design
The has 3 sets of Silo cannons spaced 120 degrees apart, like a normal Flank Guard.

Trivia

 * Depository and Repository have a similar situation to Decentralizer and Recentralizer, with both pairs of tanks being named near-identically and each pair sharing a common pre-evolution (Silo and Annihilator respectively).