The I'm a Celebrity runner-up and former Pussycat Doll stepped into the notorious nanosuit worn by the game's protagonist Prophet.
Roberts's suit, which in Crysis 3 turns Prophet from a mortal to a near-indestructible force challenged with saving mankind, took six hours to complete.
Speaking to Digital Spy as she was getting painted up, Roberts declared: "It's kind of fun. The more and more they get done, I'm feeling like I'm becoming a real superhero.
"I'm pretty much painted head to toe except for my face, so it's kind of fun and exciting."
Roberts also took the opportunity to speak to DS about her desire to reunite with Nicole Scherzinger on The X Factor, the rumoured Pussycat Dolls comeback, her plans for a solo album and reports of her flirting with Prince Harry.
Crysis 3 will be available on Xbox 360, Playstation 3 and PC from Friday (February 22).