Vidmaster Challenge: Classic

Vidmaster Challenge: Classic is an achievement in Halo 3: ODST and is also one of the Vidmaster challenges.

It is unlocked when you complete any level solo on Legendary, without firing a shot or throwing grenades. It is worth 25 Gamerpoints.

Trivia

 * This achievement is similar to a challenge players completed in Marathon that spawned the name Vidmaster. This is likely the reason the challenge is named "Classic".