Summer Mystery Bundle is a pack made of random Steam keys. Each mystery key may contain a quality A-grade game or indie title.
The price of a single mystery key is $1.00/€1.05. The more mystery keys you buy the less you pay, up to 10 mystery keys for $6.99/€7.59.
Follow Fanatical Blog to see clues about what kind of games you might find in the newest mystery bundle.