If you're not busy any of this week's retail releases, or the titles that will be leaving Xbox Game Pass soon, you might be more interested in the latest title to be offered to try out during Xbox Live Gold Free Play Days. Starting today, Xbox Live Gold members can try out Surviving Mars As usual, during the Free Play Days, players can unlock achievements. While the game is available to try in its entirety,has an estimated completion time of 100-120 hours, making it impossible to get the full completion during the trial period. If that doesn't bother you and you're just after as much free Gamerscore as you can get, you can start downloading the game from here If you decide you like the game and want to play it after the Free Play Days are over, it is currently on sale. The standard, Digital Deluxe and First Colony editions are all discounted by 67%. Your progress will be carried over into the full game if that's the route you choose.We've got the full list of Surviving Mars achievements - check the list for guides to unlocking them.