UPDATE: Unfortunately, recent developments have revealed that the NS translation is a machine translation (i.e Google Translate) rather than a proper one and has been taken down. This post will remain for posterity’s sake.
One of the most famous mecha eroge for the PC-98 now has a translation, courtesy of translator Roguelike.
While listed as partial, this only pertains to mostly less important elements such as CGs with baked in words and certain UI elements – the main bulk of the plot has been translated.
The translation can be found here.
I have written about this game here