One of the oldest premium games for Windows Phone, Assassin's Creed -  Altaïr's Chronicles HD, a RPG adventure/combat classic, has just gone free in the store. Although we've never reviewed it here, I can tell you that the story and graphics are terrific (it's 150MB or so to install over wi-fi) and let down only by some finnicky controls. Well worth grabbing as it's free though? Some screens below.

Here's Assassin's Creed -  Altaïr's Chronicles HD in action:

The game offers:

• Incredible variety of acrobatic moves for a very rewarding gaming experience.
• 6 weapons for both close combat and long-range attacks: swords, daggers, grappling hooks, and bombs.
• Skill-based mini-games put your patience & dexterity to the test: perform pickpocket maneuvers and make informants talk.
• Unique dramatic tension, intensified by 3D cinematic cut scenes and character voices.
• Collect orbs to upgrade health and weapons.
• Highly polished 3D graphics providing full immersion into a true-to-life Medieval Middle East environment.

You can currently download Assassin's Creed -  Altaïr's Chronicles HD for free here.