Naughty Naughty

Naughty Naughty is an achievement in Halo 3: ODST. It is awarded for killing 10 Engineers in New Mombasa at night, alone or with another ODST. It is worth 5 Gamerpoints.

In contrast to the Good Samaritan achievement, it is represented by a downward facing ODST helmet lighted below by a red light.

Tips

 * If one stumbles upon a group of Covenant forces being shielded by an Engineer and do not wish to give away ones' position by trying to kill the Engineer first, kill the squad they are shielding and they will self-destruct. As long as the player has hit the Engineer with his/her weapon sometime during his/her attack, the player will get credit for killing it.
 * To conserve ammo, one can look for the Engineers that are isolated from other Covenant troops in the garden areas in the level Mombasa Streets. Even though these Engineers will provide energy shield for each other, one charged Plasma Pistol shot can kill an Engineer on Normal difficulty.