If you're looking for anime similar to Space Runaway Ideon, you might like these titles. All recommendations are made by Anime-Planet users like you!
The year is Universal Century 0079 and mankind is yet again at war. The space colony Side 3 has declared itself the Principality of Zeon and has separated itself from the Earth Federation. In a raid on the colony Side 7, Zeon troops force a band of civilians, military recruits and one green ensign to escape on a previously unseen class of ship with prototype Federation mobile suits. Among them is Amuro Ray, who piloted the Gundam during the raid on Side 7. Unfortunately, his mastery of it earns him the responsibility of using it in the war against Zeon...
A father dies and bequeaths to his son the legacy of his work: A robot he was designing, or an ancient robot he was studying - same difference; after some analysis of the manuals the son manages to pilot the robot and becomes the protagonist. Our hero robot - soon combined with a hero ship that's on the run from their home that has been wrecked by the enemy - fights an endless string of opponents, who themselves bicker interminably with their internal politics and strife.
The original Gundam and Ideon were made by much the same people and in a relatively short space of time; Ideon contains music, animation, pacing, mecha fights and characterisation that are markedly similar to the Gundam title. I really can't think of a better recommendation for either title then the other - if you enjoyed one of these classic mecha romps, the other may very well be to your liking.
It is Universal Century 0153. On the space colonies located at Side 2, the Zanscare Empire has come to power and it holds onto that power through liberal use of the guillotine. With its forces invading the Earth and its space fleets preparing to subjugate the other Sides, the Zanscare Empire has nothing to fear from the weakening Earth Federation. It is opposed only by the League Militaire, whose state of the art mobile suits and young pilots comprise the only real resistance movement. Now, thirteen-year-old Uso Ewin has been dragged into the war by a battle near his home in Eastern Europe. As the Newtype pilot of the Victory Gundam, he fights not only to defeat the Zanscare Empire but also to find out what has become of his parents, who left him behind when they went into space.
You can't get more "Kill em' All" Tomino than these two ... both can be a hit or miss though, I personally didn't like Victory too much but loved Ideon. I'm sure many are different on that, or may agree, might love or hate both, etc! All in all though if you want brutally grim Tomino shows, these are it.
In the year 2977, humanity has long passed its peak; machines are able to perform any task a human can, and people have succumbed to apathy. However, there remains one who refuses to accept such an existence: Captan Harlock, a pirate who sails the sea of stars aboard his ship, the Arcadia. He is feared and loathed by most inhabitants of Earth, and yet he is their only hope against the Mazones, a strange alien race of beautiful women that threatens humanity. Thus begins a lonely battle in which Harlock and the crew of Arcadia struggle to stay true to their ideals, while slowly unravelling the sad tale of the Mazones.
Harlock and his crew are practically banned from Earth while they fight to protect it from an alien race called the Mazone, which resemble beautiful women in appearance. In Ideon the group who discover the "Solo Ship" and the Ideon end up being pushed away from their homeworld as well, with nowhere to run while being chased by the mysterious Buff Clan that resemble humans themselves. In both shows, the casts home is ... their spaceship, with nowhere else to go. If you can appreciate old art and animation it's easy to say both shows still look great to this day, with the exception of Ideon's recurring stock footage here and there. The Harlock series has better pacing and a much more likeable and developed cast all around, while Ideon is strikingly a bit more darker in tone and very desperate in nature. Both have incredibly impressive soundtracks, orchestrated and all. By the end of these two shows you yourself might be out of breath, as you'll feel like you went through these huge adventures personally. Typical of Tomino stuff Ideon is a little quirkier at times and has mecha, but overall the show is far more space drama than some of his other works. Overall, both have a lot of similar themes and ideas, with very different styles and executions in terms of writing/directing. But in the end these are two amazing, action packed, and adventure filled classic space dramas. And please note: Be Invoked IS the ending to Ideon. Episode 39 is just a sampler.