Good Old Games are giving away the classic arcade shooter Tyrian 2000 to anyone who stops by the site. The giveaway coincides with the launch of a mammoth Christmas sale, knocking up to 50% off hundreds of titles. You can scoop Baldur's Gate 1, Baldur's Gate 2, Beyond Good and Evil and Psychonauts for just $6.99, or games like Outcast, Total Annihilation and Broken Sword 2 for $4.19 each. There are 290 games in the sale, making this a good time to have a sift through the pile and see if there are any old gems you can add to your collection. Head over to the Good Old Games sale page to have a browse.