Tremors 1-3 Attack Pack

"Tremors (1990): Perfection, Nevada is under siege by giant worm monsters that can tunnel through the earth at an alarming speed. Handymen Valentine McKee and Earl Bassett (Kevin Bacon and Fred Ward) barely escape the things they dub 'graboids' by seeking safety high above their reach, preferably on solid rock outcroppings. The graboids are blind but use sound to hunt their prey, a fact that necessitates clever strategies to lure them away from the frightened citizenry. Helping the boys are geologist Rhonda LeBeck, whose seismometers can track the graboids, and Burt and Heather Gummer (Michael Gross and Reba McEntire), survivalist extremists with a basement of firepower capable of wiping out a small army.
Tremors 2: Aftershocks (1996): Seemingly everyone else in Perfection has made a bundle from graboid-related business and moved on, leaving Earl Bassett (Fred Ward) broke and ready to respond to a job offer from Mexico, where a Mexican oil company's fields are being overrun by man-eating graboids. Bassett has a great time suckering the graboids into his dynamite traps; his new sidekick is Grady Hoover (Christopher Gartin) and he also has time to find his own geologist girlfriend, Kate Reilly (Helen Shaver). Earl invites his pal Burt Gummer (Michael Gross) to get in on the fun, but their easy pickin's come to an abrupt halt when the graboids adapt themselves with a little battlefield "mutationeering." Each graboid spits out three biped 'screamer' monsters, smaller above-ground running nasties. The screamers are blind as well, but locate their meals with heat-sensing organs. To escape detection, the humans now have to stay quiet and cool.
Tremors 3: Back to Perfection: After helping some Argentinians wipe out an infestation of screamers, Burt Gummer (Michael Gross) returns to find Perfection transformed by graboid mania. Store owner Jodi Chang (Susan Chuang) is doing mercantile battle with scam 'graboid tour' guide Jack Sawyer (Shawn Christian), while Melvin Plug (Robert Jayne from the first film) is trying to make a buck by subdividing the valley. Then the graboids reappear. Government agents citing the Endangered Species Act want to protect the monsters and prevent Burt from spearheading a counterattack. Burt has to face being swallowed whole by a graboid, and being chased by one called the "great white," while screamers also make repeat appearances. Finally, the monsters mutate into yet another configuration called "ass-blasters." Volatile chemicals in their stomachs are turned into rocket fuel, allowing them to jet across the sky on their own ignitable flatulence."
 
This is the 3 Disc Anthology edition in very good but used condition