“The first time we saw him we thought, ‘Oh my God, what a great Mortal Kombat character he would make.’”

Ed Boon is very excited. The Mortal Kombat creative director and co-creator can finally spill his guts regarding one of the most anticipated video-game crossovers of all time: Kratos’ exclusive guest appearance in the PS3 version of Mortal Kombat. “We kind of felt it was meant to happen,” he says. “We think we’ve done Kratos justice.”

Ed Boon and God of War III director Stig Asmussen don’t remember who made the first phone call, but both recall the Kratos crossover talks starting early in Mortal Kombat’s development cycle. “I remember somebody saying, ‘‘hey, there might be this possibility of Kratos appearing in Mortal Kombat,’” Stig remembers. “I said, ‘ You gotta be kidding me, we gotta make this happen! Let’s get on the phone.’” Describing himself as a “huge God of War fan,” Boon was all too eager to work out the details and spark a larger collaborative effort between both studios.

Capturing “the real Kratos” in Mortal Kombat was a prime goal for Boon and Netherrealm Studios, but it wasn’t always an easy one. “The God of War team set certain ground rules,” Boon says. “From the beginning, we were absolutely set on respecting the character.” Boon describes a “receptive” relationship with Sony Santa Monica Studios – creators of God of War – during development of Kratos’ Mortal Kombat incarnation, with Boon’s and Asmussen’s teams regularly trading feedback and ideas. Absolute authenticity being a key consideration, Boon’s team went so far as to use Kratos’ God of War III character model as a reference asset. “Once we started sending playable builds of Kratos, that’s when they got specific regarding things like animation,” Boon recalls. Particularly regarding Kratos’ fatality, which went through a number of edits and revisions due to feedback from Sony Santa Monica Studios. “It was mostly minor stuff, certain tweaks to the animation,” Boon remembers. “We went through a lot of iterations, but in the end, when you look at that screen, you see Kratos.”

Asked about his favorite aspect of this chaotic crossover, Boon answer comes easily. “Just seeing Kratos and Scorpion on the screen at the same time. You never thought you’d see that.” Boon loves God of War and, in particular, Kratos because he’s “unapologetically brutal.” The feeling is mutual – Stig is a longtime Mortal Kombat fan, too. “One of the strongest points of Mortal Kombat has always been the character design,” he tells Boon. “You’ll see a character and you’ll know it’s a Mortal Kombat character.”

Kratos’ guest turn in Mortal Kombat wasn’t without a few creative conundrums, of course. As a demigod, Kratos is not one to show vulnerability. So at first, seeing the all-powerful Kratos torn to pieces by the likes of Shang Tsung – in glistening HD detail thanks to Mortal Kombat’s gruesome character damage modeling – came as a bit of a shock to Sony Santa Monica Studios. “The things that were being done to Kratos were not things that we were used to seeing,” Stig confesses. “It’s taking it to an almost uncomfortable place at times because here Kratos can get his ass kicked.” On the other hand, Boon points out, “Kratos is in the mud like everybody else.”

“I will say that I’ve never seen his skull before this game,” Stig counters with a laugh. “But man,” he adds, “you guys really pulled through. I’m proud of that game.”