Cammie Dunaway, Nintendo of America's executive VP of sales and marketing has called the sales of Grand Theft Auto: Chinatown Wars "frustrating"

He went on to say;
"We do think it'll have a long tail and we've seen that with a lot of titles across all genres on the DS platform that consumers continue to discover them. But part of what's needed is you have to continue to put marketing support behind these titles."

"It's one of the things we've learned over the past few years. The old dynamic of throw it on TV for a few weeks and forget it isn't going to work, because new consumers are coming in all the time."

Source: gamesindustry