The player is placed on a grid and can only buy upgrades next to ones they have already unlocked.

The score calculates and awards the player "Internet money" in which they can buy upgrades for the game.

Points can then be used to buy upgrades such as armor, shields, and weapons.

To overcome some factors, such as long lines and stock, players can buy upgrades.

These points allow them to buy upgrades for Raiden's equipment.

While they may buy upgrades and replacement parts, for many people purchasing a bike is a one time cost.

Once a country buys a weapon system, it will need to continue to buy spare parts or upgrades.

Humans do not have different classes; instead they can buy and sell upgrades at a structure called the "Armory".

Advancing gives the player a number of picks with which to buy upgrades to their character's statistics and abilities.

Between levels, players are given the option to buy upgrades for their ship.