If you're looking for anime similar to Code Geass: Lelouch of the Rebellion, you might like these titles. All recommendations are made by Anime-Planet users like you!
Princess Rinda and her brother Remus are the foretold Twin Pearls of Parros – one will be a shining prophet and the other a great ruler. However, when their homeland is lost to the invading Mongaul army and their parents slain during the siege, Rinda and Remus are transported into Rood Forest, a dangerous hideout for ghouls. Lost and vulnerable, the two barely escape death thanks to the help of a powerful man with the head of a leopard called Guin who cannot remember who is or how he became that way. Together they journey across the land, evading monsters, fighting the power-hungry Mongaul army, and gathering trusted companions such as Istavan Spellsword and Suni of the monkey-like Sem – all in the hope of fulfilling their destinies and finally bringing peace to Parros.
Middle school student Ganta Igarashi witnessed the slaughter of his entire class by the mysterious 'Red Man', and as the only survivor, he was labeled a mass murderer and sentenced to death. Now an inmate at the privately-owned prison and ‘amusement park' known as Deadman Wonderland, Ganta must try to survive in a place where inmates are the main attraction in brutal gladiator-style games. At the same time, he must attempt to uncover the truth behind the ‘Red Man', his mysterious childhood friend Shiro, and why he was the only survivor that bloody day.
If you liked Deadman Wonderland, I think you'd like Code Geass because they are both about revenge. In DW, Ganta is framed for murder and seeks his vengence against the Red Man. In Geass, Lelouch sets his sights against Britania in order to protect his sister. Not only are the elements of vengence the same, but there are supernatural power similarities as well. Ganta gains powers from the Red man, while Lelouch gains a mysterious power called Geass from a mysterious girl called C2.
After being threatened by extinction at the hands of alien invaders called the Zentradi, humanity undertook the task of guaranteeing itself a future by launching fleets of colony ships into space. On Macross Frontier, one such fleet, high school student Saotome Alto's life is changed forever: the fleet is suddenly attacked by unidentified creatures while he is performing aerial stunts for a concert by the wildly popular idol Sheryl. Alto quickly finds himself in the cockpit of a new-model fighter struggling to protect Ranka Lee, a young girl he met only hours earlier, from the invaders' swath of destruction. Noting his performance during this incident, the S.M.S. Skull Squadron private military company invites Alto to join their organization, where he continues protecting his friends and Macross Frontier.
The Holy Grail War is a battle between seven magicians who each summon a mythical hero to fight for their cause. Shirou, a twice orphaned high school boy, had so little magical talent that his foster father did not bother teaching him about the war and its meaning. Thanks to that lack of foresight, Shirou finds himself in a bit of a pinch when he accidentally summons a hero of the strongest class, and is sucked into the fray. The Grail grants the winner any wish they have. But driven by an unyielding sense of justice and self-sacrifice, for what will Shirou fight?
The feel of both anime is similar at times, aswell as some of the styles of animation used during the action scenes. They are both pretty serious and rarely detract from the main plot for the sake of humour. They are both action packed and visually impressive. They both deal a lot with the morals and philosophy around war and fighting. Both of the main protagonists are in high school, and are chosen by a very powerful and beautiful female assistant, who begins the series far more powerful than them, but the gap bridges as the series progresses. These female assistants are similar in demeanour, as they are humourless cold, but likeble for this very fact. They also both lived in another time.Infact these female protagonists have so much in common it's a reason alone to watch both. If one of the main things you liked about one series was the female protagonist, be prepared to fall in love again. Fighting with reference to ruling kingdoms/empires, and family ties is touched upon often in both series. It dosen't seem like many, if any others have linked these series together, which suprises me, as they share a lot of good points, so i think you may find what you liked about one in the other.
The Nation of Gallia has always remained neutral in conflicts and has only gone to war to defend itself. However, as war flares between the East Europan Imperial Alliance and the Atlantic Federation, Gallia is soon targeted for its abundance of ragnite ore, a versatile and hugely valuable material. The Civilian Militia is soon called into action, and Welkin Gunther - son of a legendary war hero - is named leader of Squad 7. Under his command are the headstrong and practical Alicia Melchiott; the sharp-tongued Brigitte Stark; the grizzled veteran, Largo Potter; and Welkin's adopted sister Isara, whose Darcsen heritage means she faces prejudice, even from members of her own squad. With the rest of Squad 7 and the mighty tank Edelweiss, they must do their best to defend Gallia.
Well, Valkyria Chronicles is simply the seinen version of the Code Geass serious. The mechas and superpowers found in Code Geass are substituted for tanks and an ancient race of superhumans that appear later in the show. Both are very dramatic, and militaristic, but Valkyrie has a bit of fantasy and romance intertwined, and is a bit more dramatic, and contains less action, but enough to match the theme of war. Also, I should note that Valkyria Chronicles takes place in 1935 Europe, while one of Geass's settings involves a sci-fi version of Brittania, which is simply an archaic name for Britain, which is a part of Europe.