Attack Squadron: Roswell

From the Zozer Games website:

A setting book for the Traveller roleplaying game, which requires the Traveller main book in order to play. Attack Squadron: Roswell lets players fly classic fighters such as the F-86 Sabre or the F-84 Thunderjet in combat with alien saucers, it also supports on-the-ground investigations of alien conspiracy. It is The Invaders meets X-COM meets Top Gun!

The game features:

14 aircraft designs from the 1950s
Rules for air-to-air combat
Rules for ground attack missions
1950s firearms
A history of the alien invasion
4 flying saucer designs, with two deckplans
Rules for creating fighter pilots
Background for New Mexico, Roswell and the USAF
Historically relevant event tables