Yes, this film really was made!
Get out your house-sized grain of salt! Basically, a satellite emplacement goes awry because the satellite collides with an alien spaceship running on autopilot and bound for an automated landing on earth. A pair of shuttle pilots witness the event and, predictably, a government cover-up ensues which attempts to cast blame on the astronauts themselves. The alien ship lands and is dragged off for investigation in the infamous Hanger 18. NASA, the military and the US government then all have to figure out what to do about it.
While the plot is admittedly silly, the dialog sometimes ridiculous, and the characters sort of one-dimensional, the screenwriters did a decent job of pacing and developing and telling the story. There are only a few entirely absurd parts. For example - while on the run, Gary Collins seems, under any circumstances, to be able to find a car with keys in the ignition and an owner who doesn't really care if he steals it. And almost every single scene in the film has two people in it.
While not exactly gripping or engaging, this is an entertaining little film to be viewed after midnight on any sleepless weeknight. Hanger 18 is slightly more credible than most X-Files episodes and slightly less well-scripted and shot. Performances are mostly fairly good, but Darren McGavin painfully over-acts most of his scenes and the number of hypertensive yelling and fist pounding scenes by the entire cast really detracts from the overall experience in a big way. Perhaps the director had a troubled childhood or just kept a too-large pot of coffee available on the set at all times. We'll probably never know. But I know that I can rate this one "somewhat more entertaining than most X-Files episodes" which, unfortunately, is more of a comment on the X-Files than this movie.