For anyone who's been looking to grab a copy of Hitman 2: Silent Assassin (either for yourself or for a friend/family member), now's a great chance to do it. By going to Square-Enix's online store page for Hitman 2: Silent Assassin and adding a copy of the game to your cart (a logged-in account is required), proceeding to the checkout page, and then entering the promo code FreeSilentAssassin, you can grab yourself a free copy of Hitman 2 on PC. The key they provide you with is redeemable on Steam, so feel free to grab yourself a key.
Thanks to Arman Ossi Loko for sharing this info.
Event has finished. For those who wanted a copy and didn't manage to grab a copy before the event ended, I have plenty of extras that will be handed out throughout the month of December, so you'll still have a chance at getting a copy for yourself.