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!
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.
In the world of Prestal, Noble men perform noble deeds for noble purposes. All of this is performed under the careful gaze of the Guild, a race apart who live in cities in the sky. We see this world through the eyes of Claus Valca and Lavi Head, as their travels take us above, beyond and through Prestal, and their actions cause ripples that shall never fade.
Both of these anime evolve around a rebellion against a tyranical government. While chess is only shown a couple times in either anime, it seems to play a major role in each. (Lelouch's battle strategy and the episode titles of Last Exile) Both anime also involve some pretty interesting technology and airships.
In post-war Japan, the nation remains unsettled and crime is as big a problem as ever. Despite his sharp mind and keen deductions, "Defeated Detective" Shinjurou Yuuki frequently loses out to his rival, Rinroku Kaishou, whose information network has previously aided many police investigations. However, in spite of his poor reputation, Shinjurou continues to work on every case he's recruited to with his mysterious assistant Inga. With Inga's power to transform into a being capable of forcing any person to truthfully answer one question put to them, the pair uses everything at their disposal to get to the bottom of each crime and reveal the true culprit – even if the reality of who solved the case never reaches the public...
It both series, you have the lead/s, in Code Geass Lelouch and in Un-Go Inga and Shinjurou that use intricate plots to bring down their foes instead of weapons (mostly). The most striking similarity is Ingra's "eye" ability to make a person answer 1 question, and Lelouch's Geass to make people do 1 thing.
As far as personality goes, Lelouch is sort of split into two with Inga and Shinjirou. While Inga is sort of crazy and has the eye power, Shinjirou is smart and calm. So far, I really like Un-Go, and Code Geass is one of my top favorites, so watch them both, no matter what you like.
Amidst the turbulent revolution of 2025 wrought by the GGP government, Rin Ogata only dreams of becoming a ballerina; like her mother before her, Rin’s grace and agility mean she’s destined for success on the stage. However, an injury and the untimely death of her parents quickly shatter her aspirations and, for once, Rin’s existence seems purposeless. That is, until she enters the garage of a club one day and sits astride a RideBack! The RideBack, a motorcycle with arms and the ability to stand upright, offers Rin a new world of boundless movement! What she doesn’t realize, however, is that this club of RideBack enthusiasts is about to get dragged into the bloody war between the GGP and the terrorists intent on overthrowing them. Life may be more exciting now, but it’s also become very dangerous: will Rin’s natural talents as a pilot be enough in a world where racing is not just for glory, but for survival?
Both of these anime are centered around school-age protagonists finding themselves caught in the battle between a New World Order and the rebels seeking their downfall. Both involve a mech (or mech-lite) device that is used on both sides of the playing field, and a guy who refers to people in chess terms. With political tension, bitter rivalries wrapped in the past, and intriguing stories, these anime are quite similar.
Years ago, humanity abandoned the ruined Blue World. Generations later, with the planet again capable of sustaining life, mankind returned. In the skies above the reborn world, rebellious young Fam and her best friend Giselle make their living as Sky Pirates. Atop sleek Vespa Vanships, the girls dart fearlessly through the clouds, capturing and selling airborne battleships for profit. It’s a life of care-free swashbuckling – until the Ades Federation attacks. The only nation to remain on Blue World during humanity’s exile, The Ades Federation wages war against those who returned only after the planet’s darkest days had passed. When Fam and Giselle rescue a princess from the clutches of the rampaging Ades armada, they join the young royal’s battle to save her Kingdom from destruction – and undertake the impossible mission of uniting humanity in peace.
I don't want to say anything about why I think these two anime are similar, because I don't want to give anything away about the plots of either. But the plots and the overall themes (peace, war, freedom) share some similarities. Everything else, maybe not so much.