Sunless Sea from Failbetter Games is a title that is all kinds of intriguing - you sail the oceans of Unterzee and try not to die while discovering all manner of strange locations and even stranger beasties. Plus there are poems, which are always welcome.
It's a game that's hard to get across in words, but thankfully we don't have to as you can get it for free for entire weekend on Steam. Just log onto the service and download the content and you'll be able to play it until the 31st of January. The giveaway is to celebrate the first anniversary of the game on the 6th of February and there will also be competitions and stuff in the coming days.
The developers have also added some new content in the form of the Rose Market, a place to trade your goods - but you won't always know what price you're going to get.
And if you like what you see during the free weekend, the game is 40 percent off until the 1st of February. Play for free here.