Two Different types of scarabs

Can anyone tell me why the scarab in gamplay is like the one in halo 3, yet the scarab in one of the halo wars trailers, and the scarab in the back of the game is like the one in halo 2?

Idk

because the halo wars trailer is like really old, and they probably decided to cut it, and introduce the scarab we see nowadays

> because the halo wars trailer is like really old, and they probably decided to cut it, and introduce the scarab we see nowadays

This.

The Scarabs in Halo 2 were versions used for mining, they were only used as an emergency when Regret realized he stumbled onto a Human world (let alone our home world) and had to bring his forces to bear. The variant we see in Halo 3 (and ODST) as well as Halo Wars is the proper combat version of the Scarab.

Hence, they changed to the combat Scarab in the final game, because it fit better than the mining version.