Director Rich Moore, working from a script by Jennifer Lee and Phil Johnston, makes this film a very entertaining computer-animated treat*.

John C. Reilly voices the title character, the villain* named Ralph in an arcade game* called “Fix-It Felix, Jr.” For 30 years, every time someone plugs a quarter* into the machine, Ralph wrecks* the same apartment building — only to have the game’s hero, Fix-It Felix (Jack McBrayer of “30 Rock”), come along with his magic hammer* and repair everything Ralph has destroyed. Then Ralph is thrown off the building roof into the mud, while Felix is given a medal by the apartment dwellers.

Ralph has lived with that for a long time; it’s the way he is programed, after all. But, as he tells other electronic villains, he has feelings, too. Being the bad guy is his job, he says — but it’s not who he is.

Ralph wants to earn a medal. So he goes rogue*, or “Turbo,” in the words of the characters in this film, and escapes into a first-person-shooter game called “Hero’s Duty.” All he does, however, is mess up a mission led by Sgt. Calhoun (Jane Lynch) against the destructive* Cy-bugs.

He is able, however, to grab a medal, just before he is expelled from that game, not knowing he’s taking a Cy-bug with him.

Later he lands in “Sugar Rush,” a car-racing game, where he tries to help a glitchy* character Vanellope von Schweetz (Sarah Silverman) realize her dream.

Then, the “Out of Order” sign appears on the screen of the “Fix-It Felix, Jr.” game because Ralph fails to appear when someone plugs a quarter into the machine. So Felix has to search for Ralph and bring him back. And the group has to fight the Cy-Bugs that can take over any game they enter.

(SD-Agencies)