https://www.humblebundle.com/store/the-bureau-xcom-declassified?hmb_source=thebureau_xcomdeclassified_freegame&hmb_medium=banner

go to that web site, and claim the game for free. must do it in the next 36 or so hours though, but you get to keep the game forever. after that it goes back to $19.99

enjoy