The official Twitter account for Avalanche Studios and Square Enix's Just Cause 4 has revealed that the game is now available on the Xbox Game Pass subscription service, meaning Game Pass users can download it right now for no added cost.
Just Cause 3 is already on the service, so it's not too surprising to see 4 in there, although considering it only released back in December the timing might be a bit of a shock. The reviews weren't amazing though (you can check out ours here), so this might be an attempt to increase exposure for the stormy sequel.
Have you had a chance to play it yet?