GOG has kicked off its Summer Game Sale to tide you over through until some of the upcoming summer and autumn releases. While you wait for the next big thing in gaming, you can always purchase some classics, or heavily-discounted, relatively recent games, so as to grow your potential-etched backlog of games. You can take the plunge on GOG's discounted catalog from today until June 18th.

All users get a complimentary copy of Xenonauts so long as they click a GOG banner, and the service is promising some 1000+ games with up to 90% discounts. As an added bonus, particularly prolific buyers get a free copy of the excellent Sunless Sea if they purchase at least €4.09 worth of games during the sale ($4.99), and a copy of Rime should they surpass the €16.19 mark.