Home Movies Heavy Metal L-Gaim I: Pentagona Window Heavy Metal L-Gaim I: Pentagona Window (重戦機エルガイムI ペンタゴナ ウインドゥ) 38 years old A recap OVA that portrays the first half of the series Heavy Metal L-Gaim.. Heavy Metal L-Gaim I: Pentagona Window (38 years) Release day: Wednesday, November 05, 1986 Runtime: 58 minutes