For a limited time Miniclip is making four of its Xbox Live titles available for free in the Windows Phone Store. Monster Island sees you lobbing rocks to save cute critters, Fragger sees you perfect your grenade launching skills, Gravity Guy has you eluding your relentless pursuers in a world without gravity, and iStunt 2 wants you to perfect your snowboarding skills.

Free Xbox games are some of a rarity, and with total saving of just under £8 this is a promotion that should make a lot of gamers happy. If we were picking one title to recommend it would probably be iStunt 2, but all the game on offer are decent and well worth downloading before the promotion end next Monday on April 15th.

From our review of Gravity Guy (82%):

Let's start with the basics. Gravity Guy has a secret power. Whenever he wants, he can change the direction of Gravity. Rather than being pulled down to the bottom of the screen, gravity will pull you to the top of the screen.

Actually it is almost whenever he wants - he can only do so when he is in contact with the ground. That means you can't employ this as a cheap way of jumping by switching gravity back around in the middle of the air. You need to make sure that when you make the switch, you're going to land on something solid. Which is where the skill comes in, because as you progress you go from nice corridors where you can always land on something, to platforms in mid air requiring switching gravity at the very end of the platform to make the next one, or a timed jump so you can slip through a gap in a vertical wall and carry on running.

From our review of Fragger (79%):

It's hard to avoid thinking about the furious feathered ones when you have a game that has your soldier standing at one end of the playing area, and you set the angle and strength of your grenade throw, and your goal is to destroy all the enemy soldiers, who are happy to stand stationary as the explosions fall around them...

Any other similarities? You've got terrain to contend with so you can bounce grenades off hills and roll them through tunnels - there are crates and doors to explode to clear a path for your grenades to reach those soldiers... and you only have a limited number of grenades to use on each level before you have to start it all over again.

Let's put that all aside, because Fragger rates quite high on the addictive scale. It's not off the charts, and I did find myself dipping in and out of it rather than playing through a huge batch of levels, but this "snacking" on the levels suits a smartphone quite well. There's not a huge amount of scrolling, so the levels are quite small in terms of design and options available. This means that you'll quickly run out of angles and throwing strengths as the key to solving levels - instead you'll be rolling grenades carefully into gaps, drainpipes and other narrow spaces.

From our review of iStunt 2 (84%):

Let's drop the '2' suffix (as I can't find iStunt 1 in the Marketplace) and look at the game itself. The first thing to realise is that rather than be a sports game, this a platform game. While you don't have 'run left, run right, jump' as your control layout, you are still asked to explore each level, make perilous jumps, memorise paths through a complicated maze-like structure, duck out of the way of low hanging obstacles... and die a lot.

And all of this happens while you are on your snowboard. Gravity is your friend, pulling you downhill at ever faster rates, and then guiding you back to earth when you take to the air from a cliff edge or little jump. While in the air you can lean forward or back (by tilting your phone) to make sure you land safely (with your snowboard at roughly the same orientation to the ground), but also to score points by doing flips in the air, and grabbing the edges of your board through two soft keys on the screen.