PC gamers can get SimCity 2000 (free for everyone who spends at least $1) and S.T.A.L.K.E.R.: Clear Sky (free for everyone who spends at least $20), as well as Xenonauts (free for everyone who spends at least $50). This offer will last until June 21 at 11:59 AM GMT.

GOG's DRM-Free Summer Sale will offer new deals every 12 hours, with more than 100 offers every day. In total, that's more than 700 games discounted up to 90% to keep things fresh.

The 2015 DRM-free Summer Sale deals start with titles like The Witcher 3: Wild Hunt at -10%, Lichdom Battlemage at -87%, 80% off Jade Empire – as well as bundles including 66% off Lucasfilm Adventures (with Monkey Island, Sam & Max and others), Enhanced D&D titles at -60% (Baldur’s Gate & Icewind Dale Enhanced Editions) and much more.

The 2015 DRM-free Summer Promo is set to last 18 days, from June 3 until June 21 at 11:59 AM GMT (13:59 CET / 4:59 AM PDT / 7:59 AM EDT).