LOS ANGELES — The ninja turtles are back, and they're winning.

The Warner Bros. adventure "TMNT," a computer-animated update of the "Teenage Mutant Ninja Turtles" comics, cartoons and 1990s live-action movies, debuted as the top weekend flick with $25.45 million in ticket sales, according to studio estimates Sunday.

Warner also had the second-place movie with "300," which had been No. 1 the previous two weekends. The battle epic set in ancient Greece took in $20.5 million, lifting its total to $162.4 million.

Paramount's "Shooter," starring Mark Wahlberg as an ex-Marine sniper framed for a presidential assassination, led the runners-up among a rush of new movies, opening at No. 3 with $14.5 million.

New Line's family fantasy "The Last Mimzy" premiered in fifth place with $10.2 million. The movie centers on a brother and sister who discover a mysterious box of toys and are endowed with superhuman powers to help them preserve humanity's future.

1. "TMNT," $25.45 million.

2. "300," $20.5 million.

3. "Shooter," $14.5 million.

4. "Wild Hogs," $14.4 million.

5. "The Last Mimzy," $10.2 million.

6. "Premonition," $10.1 million.

7. "The Hills Have Eyes 2," $10 million.

8. "Reign Over Me," $8 million.

9. "Pride," $4 million.

10. "Dead Silence," $3.5 million.