While Vision of Escaflowne isn't the first isekai mech series, it's certainly the one with the coolest-looking fantasy mech.

Visions of Escaflowne, Armored Core, Front Mission Evolved, and more. My favorite ones were a brawler that can charge a lance and impale one enemy for a few meters, and a mech specialized in laser ...

a world where he is Van Fanel, the new king of the land of Fanelia and pilot of the legendary mecha fighter "Escaflowne". But this is not a peaceful land; Fanelia is under attack from a mysterious ...