It's that time of the month again, when Pocket Gamer gives away a bounty of codes for last month's absolute best games to our wonderful community, the App Army.

For those unaware, that's our diehard band of mobile gaming enthusiasts. In exchange for their critical thoughts, we give them codes for unreleased games on a weekly basis and you can join in the fun by simply signing up on Facebook.

That's a requirement to get a chance at a code in the giveaway, but more on that later. Let's kick things off.

Sunless Sea

As the name suggests, Sunless Sea is as dark a game as you can expect from the App Store. It's set in a dystopian victorian London which has been overrun by nasty monsters.

You play as captain of a ship, and have to survive on the open seas for as long as you can. Oh, you're going to die a bunch of times - death's inevitable here. All you can hope is that you survive as long as your last playing session.

What else can you expect when you're contending with giant crabs, sentient icebergs, and the devil himself?

At review, we gave Sunless Sea a Silver Award and said: "Though it can be a little slow, Sunless Sea is a cracking exploration game with a dark, gothic undertow".

Okay, I'll give it a go

Not so fast! First you have to sign up to the App Army here, then write your name as it appears on Facebook in the comments beneath this post. We'll then select the lucky winners over the next few days.

We only have iOS codes for this one - sorry Androiders! There'll be plenty more codes in a future giveaway.

And that's it. We'll be back tomorrow with a brand new game so keep checking back at 5PM BST.

What's the App Army? The App Army is Pocket Gamer's very own community of mobile game experts. Each week, we provide them with a bunch of free codes and early access to the hottest upcoming games so they can provide their thoughts in features like this. We also host regular community-driven events with them in mind like tournaments, giveaways, and multiplayer evenings. To join, simply follow this link to the page on Facebook.