"I don't smoke, I don't drink, I don't do drugs," declares one diehard gamer in Seth Gordon's winning documentary, The King of Kong. "I play videogames, which is a far superior addiction."

A deep, dark look into gaming culture - pasty-faced guys with astounding hand-eye coordination and an obsession for "retro games" like Pac-Man - Gordon's film focuses on the rivalry between the long-reigning Donkey Kong champion and a nice-guy schoolteacher challenger.

In one corner: a long-haired chicken-wings, hot-sauce magnate named Billy Mitchell, who has held the highest Donkey Kong score known to humankind (and nerdkind, too).

In the other: Steve Wiebe, a Washington state schoolteacher and family man with a Donkey Kong arcade game in his garage. Wiebe has invested thousands upon thousands of hours studying the daunting levels of barrels, fireballs and ladders that make up a game one player describes as "ridiculously difficult right from the first screen."

Wiebe has mapped and graphed it, and mastered the joystick. He is ready to play.

But Mitchell and his legion are not ready to accede.

With supporting characters that could have just stepped out of a Christopher Guest mockumentary - a Star Wars-quoting, guitar-strumming referee, a Machiavellian mentor longing for his 15 minutes of fame - The King of Kong is thoroughly engaging, even as it explores the ugly underbelly of competitive gaming.

Can a videotaped home game produce a legitimate score for the record books, or do the real titles have to be won in a "live game" in an officially recognized arcade venue?

And are there people that really care about that question?

You bet.

The King of Kong *** (out of four stars)

Directed by Seth Gordon. With Walter Day, Billy Mitchell and Steve Wiebe.

Running time: 1 hour, 19 mins.

Parent's guide: No MPAA rating (competitive videogame nastiness)

Playing at: The Bridge tonight at 7:30 p.m. and at International House on Tuesday, April 17, at 9:15 p.m.EndText

Contact movie critic Steven Rea at 215-854-5629 or srea@phillynews.com. Read his blog, "On Movies Online," at http://go.philly.com/onmovies.

Also screening today:

2:15 p.m. Salty Air (Italy, drama) Ritz East

4:30 p.m. Rocket Science (U.S., comedy-drama) Ritz East

7 p.m. Little Things (U.S., drama) Bryn Mawr Film Institute

7:15 p.m. I Don't Want to Sleep Alone (Taiwan/France, drama) Ritz East

9:30 p.m. Change of Address (France, comedy) Ritz Five

For more festival information go to www.phillyfests.com