- The stage begins by spawning one Shibalien Elite.
- Another Shibalien Elite spawns after 5 seconds.
- Metal Doge spawns after 10 seconds.
- A third Shibalien Elite is spawned after 13 seconds.
- The stage will then send in Shibalien Elites and Metal Doges en masse.
- After 54 seconds, no more enemies will spawn except for Ms. Sign.
This stage is quite easy. Use any Critical Hitters you have (Examples: Catasaurus, Hurricat and Waitress), along with a couple anti-Aliens, like Psychocat or Castaway, as well as the Elemental Pixies. Just hold out with meatshields and your Ubers should take care of the Aliens while your Critical Hitters take out the Metal Doges.
- In real life, the Roswell UFO Incident was an incident in mid-1947 in which a "flying disc" crashed at a ranch near Roswell, New Mexico. It turned out that it was merely a United States Army Air Forces balloon .