The Market is a game section where you can get access to all Mechs and Weapons. To go to the Market, click the "Gear Hub" button in your Hangar:
How does it work?
The Market is split into 8 Tiers that must be unlocked sequentially. Each Tier contains a variety of Mechs and Weapons that you can acquire using Credits, A-Coins, and in-app purchases.
You start in Tier 1. To unlock the next Tier, you must collect a certain number of Tier Stars in the current Tier. For example, you will need Tier 2 Stars to unlock Tier 3.
You can earn Tier Stars either by acquiring Mechs and Weapons or by ranking them up. When you rank up a Mech or Weapon, you receive one Tier Star. Acquiring a Mech or Weapon will earn you the number of Tier Stars equivalent to that Mech or Weapon's Rank the moment you acquire it.
For example, in Tier 1, you have Rank 1 Paragon and Rank 1 Autocannon 4, i.e., two Tier Stars. If you buy a Rank 2 Plasma Cannon, you'll receive two more Tier Stars. After upgrading any available piece of equipment by 1 Rank, you'll receive the fifth Tier Star and unlock Tier 2.
The further you progress through the Tiers, the more Tier Stars you will need to unlock them. Remember that only Tier Stars collected in the Tier immediately before the one you want to unlock will count towards it.
For example, once you unlock Tier 3, Tier 2 Stars will not help you progress towards unlocking Tier 4 — only Tier 3 Stars will count.
Before you have unlocked a Tier, you can still get Mechs and Weapons from it by purchasing them in Shop Offers or winning them as rewards from Events. Just remember the Tier itself will remain locked, even if you have obtained some content from it. So, you'll be able to use the particular Mech or Weapon you got, but the rest of the content in the Tier will be inaccessible.