Guns Up is free to play, and as such comes with multiple currencies, each serving a different purpose in an economy that’s ultimately all about getting you to open your wallet. The premium currency, Gold, can be used to hire a unit you haven’t yet unlocked, or on Hearthstone- style card packs. Perhaps its most optimistic use is in the base-building component. Fancy spending a pound on a campfire for your HQ, or 50p on some bluebells? Thought not. Us neither.