Star Trek Online is the first "massively multi-player online role-playing game ever set in the Star Trek universe," Atari noted in a news release Wednesday.
Nimoy, who reprised his role as Spock this year in the movie, "Star Trek," will voice the introduction for Star Trek Online and will be heard during scenes in the game.
"I am happy to be involved with Star Trek Online. In this game, the essence of Star Trek -- exploration and adventure -- lives long and prospers," Nimoy said in a statement. "I'm pleased that a whole new generation of fans will be able to discover new frontiers in the Star Trek universe."
"Mr. Nimoy's participation in Star Trek Online brings the game to a whole new level," Jim Wilson, Atari's president and chief executive officer, said. "When Star Trek fans hear his voice they will know that Star Trek Online truly is part of the Star Trek universe."
The company did not give a date for the game's release.