There are 15 Klues in Season 3 of Mortal Kombat 1's Invasions Mode, helping to break up the grind just a little. Almost every Season 3 Klue can be solved with some rational thinking, though not all of them are accessible to the player right away. One thing that they all have in common though is the fantastic rewards that they offer, which is why so many players are keen to complete them before the season comes to an end in mid-February.