Around 17 minutes to beat both campaigns in Story Mode and Time Attack Mode. Beating any one of these three things could potentially count as beating the game, but was not sure initially, so completed one of the Time Attack modes and both campaigns in the story mode. Had I gone straight for story mode it would've only taken a few minutes.
Time Attack playthrough is shown first and then the two Story Mode campaigns.
This month is a high volume month with a focus of beating 120 + games for the month. So there is alot of shorter and quick kills I saved up for this month. Will mix in some longer games too. There is still more games in this series that should be very quick kills.