This giveaway is for those who missed the promotion on Steam. You can get this game before 3/24/2020 on Steam and Square Enix Store.
Links:
https://store.steampowered.com/app/203160/Tomb_Raider/
https://store.steampowered.com/app/289690/LARA_CROFT_AND_THE_TEMPLE_OF_OSIRIS/
https://store.na.square-enix-games.com/en_US/product/604614/tomb-raider-steam
https://store.na.square-enix-games.com/en_US/product/604617/lara-croft-and-the-temple-of-osiris-steam
The keys expire in 3/31/2020.