Wikipedia
Auts is a small mountain range west of the Ebro river in the Bajo Aragón-Caspe/Baix Aragó-Casp comarca, Aragon, Spain. It is located about 9 km north of Fayón (Faió), close to the road between Maella and Mequinenza (Mequinensa). The ridge's highest point is Alt dels Auts , a 434 m high summit.
The Auts are desolate-looking limestone mountains, smooth, with low and scruffy vegetation and numerous denuded patches. In some documents in the Spanish language, these hills appear under the name Sierra de Mequinenza, but they are actually not a proper "sierra".
Auts was the first spaceship shooter game set in differing caves. The game was designed to be played with 2-4 players who would fly around a cave with spaceships shaped like the letter V. The game was developed by KUDOS in 1995 for MS-DOS and featured a number of weapons ranging from bombs to dirt cannons and cloaking-devices. In the first series Auts featured only four maps and even though players criticized the amount of maps, it was commonly agreed upon that the quality of them was exceptional. Later more maps were introduced by KUDOS themselves and also community map designers who shared their maps through internet. This was especially a noticeable feat, since the game didn't include any manuals or tools for creating maps. The game also featured sounds, although current PC's could hardly play them for the lack of memory capacity in those times. The game was marked as software, which you could register through the developer for full-version.