Eidos Montreal have finally opened up about what Deus Ex: Human Revolution takes on board from controversial sequel, Invisible War.
"The truth about Invisible War is that I personally did not get as much enjoyment out of it as I did the original Deus Ex," game designer Frank Lapikas said on the Human Revolution Tumblr.
"Looking at Invisible War was a cautionary tale. The game showed us how some apparently simple design decisions such as universal ammo could alter the essence of what Deus Ex is."
Lapikas said Invisible War contains all the elements of Deus Ex and yet "doesn't feel quite right" to him.
"It made us realize that it would be very easy for us to screw up Human Revolution. We had a fine line to tread after all," he continued.
"So in essence we used Invisible War and compared it to Deus Ex 1 in order to operate a 'course correction'; which means we reverted most decisions in Invisible War in favor of what Deus Ex 1 had done."
The designer noted that to the extent of his knowledge, Human Revolution contains nothing lifted from Invisible War which did not also exist in the original Deus Ex.
"Doesn’t mean Invisible War was a bad game. But it’s not the game we were trying to live up to," he concluded.
2003's Invisible War holds an 80 Metacritic average, ten points below the original game. Fans of the original game are strongly divided on the subject of the sequel's quality.
Deus Ex: Human Revolution comes out at the end of August on PC, PlayStation 3 and Xbox 360.