To enjoy your Modern Warfare 3 Free Access, all you have to do is download the game on the platform of your choice.
The offers is available on Steam and Battle.net for PC, as well as on Xbox Store and PlayStation Store for console players. Here are links for all platforms:

Call of Duty Modern Warfare 3 (PC Steam)
https://eu.shop.battle.net/en-us/product/call-of-duty-modern-warfare-iii

Call of Duty Modern Warfare 3 (Xbox Store)
https://www.xbox.com/en-US/games/store/call-of-duty-modern-warfare-iii-multiplayer-free-access/9NTDN3C3TP5M/0010

Call of Duty Modern Warfare 3 (PlayStation Store US)
https://store.playstation.com/en-us/product/UP0002-PPSA01649_00-CODMW3CROSSGEN01

Call of Duty Modern Warfare 3 (PlayStation Store EU)
https://store.playstation.com/en-us/product/UP0002-PPSA01649_00-CODMW3CROSSGEN01

https://store.steampowered.com/app/232090/Killing_Floor_2/

 Ends in 3 days.

Hey Darterz. Welcome back. It's good to see you around again. I still remember those BF2 days with a smile.

Hey guys, long time no see, and man am I happy to see NRNS is still here, if a shadow of what it used to be.  It makes me so incredibly happy to see so many names I knew when I first started hanging out here in my teens(BF2 crew I'm looking at all of you that are still somehow around), and so many new faces.
I scrolled through the roster and saw so many names I knew and so many I didn't, but can't wait to get a chance to meet and talk to you guys.
How have you all been?  I hope everyone has been doing well, and I hope those of you who I know were(and ARE because this world is a mess right now) going through some tough stuff at the time are doing better.

Just checking in on everyone
Darterz

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As they say in Brazil "first corn belongs to the chicks".  Next time I'm going to knife your guts out.