It may be a Garry's Mod (Gmod) map file. Gmod players often download .rar files containing "keys" or "content packs" to prevent "Missing Texture" errors when loading specific European-style maps.
This translates to "Alternay Station." While there is no major real-world "Alternay" station in France, it is a common name used in fictional French railway modeling and virtual simulation maps. Download Cles Gare d'Alternay rar
Identify which specific game community (e.g., Simulation Ferroviaire ) the map "Alternay" originates from. It may be a Garry's Mod (Gmod) map file