In Hard Corps: Uprising, you can unlock upgrades by earning Battle Points (BP) through gameplay. Here's how to unlock upgrades:
Play through the game's stages and defeat enemies to earn BP.
Accumulate enough BP to reach specific thresholds.
At the end of each stage, you'll be presented with a choice of upgrades based on your accumulated BP.
Select the upgrade you want by spending the required amount of BP.
The chosen upgrade will enhance your character's abilities and firepower.
Repeat the process in subsequent stages to earn more BP and unlock additional upgrades.
By earning and strategically spending BP, you can enhance your character and increase your chances of success in Hard Corps: Uprising.