Right now Middle Earth: Shadow of Mordor GOTY edition is free to play on Xbox for the weekend. More importantly, it's on sale for only $4 over the weekend.
If anyone hasn't picked it up yet, you won't find a deal better than this on Xbox. Definitely worth picking up.
Edit: it's apparently also only $4 on steam and PS4 as well. Rejoice.
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Pretty pimp game for $4 lol. I'd strongly recommend it. Story sucks, combat and progression is simplistic, but it's a lot of fun to brutally exterminate thousands of Orcs.