Despite all the success the vaunted Mortal Kombat franchise has had over the years, it has never enjoyed a month like April 2015.

According to the latest NPD Group results , Mortal Kombat X was the #1 title for April and furthermore, NPD analyst Liam Callahan says it's the "biggest month ever for the franchise in terms of sales."

In fact, it's the second-largest debut month in the history of fighting games ( Super Smash Bros. Brawl still has the crown). It's also interesting to note that the PlayStation 4 version of MKX did better at retail. As for the overall software chart, it's below; Grand Theft Auto V came in at #2.

Overall software sales rose 13 percent to $256.7 million (up from $227.6 million in April 2014), and Callahan says this is mostly due to sales on current-gen consoles:

"For new physical console software, eighth-generation consoles sales grew by 200 percent in revenue, which offset declines from seventh-generation consoles of 62 percent, and portable declines of 32 percent. Overall, console software increased by 20 percent, leading to overall video game software growth of 13 percent."

While PS4 held software sway in April, it lost the top hardware sales spot to Xbox One. However, Sony was quick to point out that PS4 remains the overall leader.