Terra Formars: Earth-hen
Japanese title: テラフォーマーズ アース編
Type: OVA
Episodes: 2
Source: Manga
Genres: Action, Horror, Sci-Fi, Suspense
Studios: TYO Animations, LIDENFILMS
Producers: Shueisha
Duration: 26 min per ep
Rating: R - 17+ (violence & profanity)

As the Mars expedition comes to an end, a small group of Terraformars manage to reach Earth and bring the fight there. Now the surviving members of the ANNEX-I along with new recruits, have to save Earth from the growing roach menace.

(Source: AniDB)