What type of currencies are in the game?

Helldivers 2 has four different kinds of currencies/resources:

• Super Credits can be purchased or discovered through gameplay. They can be used to purchase Warbonds, or to purchase armor from the rotating Surplus Store.
• War Medals can be discovered through gameplay or awarded for completing objectives, and can be used to unlock the content in Warbonds.
• Requisitions are awarded to players for completing objectives, missions and operations. They can be used to unlock new Stratagems through the Ship Management terminal.
• Samples can be discovered through gameplay and come in three different rarities: normal, rare and super rare. Harder mission difficulties will contain more rare samples, as displayed when choosing mission difficulty. They can be used to upgrade Stratagems through the Ship Management terminal on your ship.