Activision Blizzard's (ATVI) - Get Report stock price snowballed on Tuesday as the gaming giant re-released the original version of "World of Warcraft," marking the 15th anniversary of the classic game.

ATVI shares shot up 4.7% to $51 as the Irvine, Calif., company's decision to re-release "World of Warcraft" free to subscribers also appeared to stoke enthusiasm among investors.

Collister Johnson, president and chief operating officer, said in a statement that subscriber numbers starting ticking up in May after the company said it planned to re-release the classic version of World of Warcraft in August.

"The `World of Warcraft' team is focused on delivering substantial incremental content in nonexpansion years," Johnson told analysts on a recent conference call, adding the company "will be supporting a release with a major awareness campaign."

Activision is also expected to get a sales bump from the latest installment in its "Call of Duty" series, "Call of Duty: Modern Warfare."

With the holiday shopping season fast approaching, investors also are taking a keener interest in other videogame stocks.

Shares of Electronic Arts (EA) - Get Report , which is gearing up for the release of "Star Wars Jedi: Fallen Order" in November, edged up 0.5% to $94.85, while Take Two (TTWO) - Get Report , little changed at $130.56, is hoping "Borderlands 3" will become a holiday-shopping-season success.