Yeah, that Ideon. Animated by Sunrise in 1980, this legendary series was the next project of director Yoshiyuki Tomino after finishing Mobile Suit Gundam. Ideon has actually been fansubbed to completion by the group Shin-Getter a long time ago, but their translation was… flawed, to say the least, and contains numerous inaccuracies. A lot of people have been requesting for better subtitles, and now that the series is available in HD it’s about time someone made an attempt at retranslating it. Considering that Shin-Getter hasn’t been active in years, I don’t believe they mind too much.
The group Encodergasm gets the credit for pretty much everything besides the translation.