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 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.

Causality

Isometric puzzler fans will have been well chuffed by Causality. You have to help a bunch of astronauts avoid a series of disasters by manipulating time.

It's very smart. You can prevent disasters from happening, work cooperatively with your past self, and solve paradoxes (whatever that means).

At review, we were quite taken with it, giving it a coveted Gold Award and saying: "Causality crafts challenging puzzles out of its clever time loop mechanics and colorful isometric aesthetic".

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 have iOS and Android codes for this one, so make sure to specify your preferred platform when you comment.

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

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 and request access. We'll get you in right away!