If you liked the Sword Art Online anime, the Anime-Planet community thinks you'd like:
both are about the main character stuck in a video game. Sword of art online is a little different since its not big on comedy as much as Ixion sage: dt is. Both animes are a great watch i recommended both greatly.
Thor and Rai are twins who live on an advanced space colony called ‘Juno’. Things take a nasty turn one day when they are kidnapped by the Federal Army’s Special Forces and abandoned on the hostile prison planet Chimera. A cycle on Chimera consists of 181 days of scorching heat and 181 nights of below-freezing temperatures – not to mention it is populated almost entirely by carnivorous plants. The convicts on Chimera have found only one means of survival – reverting back to the law of beasts. For the strong-willed Thor adjustment comes naturally; but for his naive and weaker brother Rai, things do not go as well. Thor must now use all his wits, strength and courage to endure life as a member of Chimeran society, rise above the rest, and take the only ticket off this planet: becoming the Beast King.
Since long ago, the wolf goddess Holo has honored a contract to bless the rural village of Pasloe with fertile harvests; and in return she has been celebrated and worshipped by the villagers. But as mankind advances, the people have begun to take command of nature for themselves and have made their own god to worship. Holo finds that she is paid little more than lip service, if not outright mocked; and considering the contract annulled, she takes human form and enlists the aid of a passing merchant, Kraft Lawrence, to return to her home in the snowy forests to the north. As they journey together, Kraft finds that he has plenty to learn from this capricious god, and she from him as well.
In the future, all facets of society are tied into OZ, a virtual world inhabited by millions of users. Kenji, one of OZ’s moderators, was set to begin another typical summer when the lovely Natsuki asked him to accompany her to her hometown as a job. However, little did Kenji know that the 'job' entailed pretending to be Natsuki’s fiancé in front of her eccentric family! Now on display and feeling like a fish out of water, Kenji tries his best to fit in with Natsuki and her relatives, until one day he receives a mysterious math problem through a text message. As an avid math fanatic Kenji can’t help but try to solve it, unaware that his actions may jeopardize not only OZ, but also the entire world...
Both stories begin with an online world that crashes with real life, and both end being so much more than that. If you loved this movie because it had so much feeling, but you wanted to see more of the other world, you should watch Sword Art Online. And if this series surprised you by being about family and love, then you should watch Summer Wars.
Both animes take place in medieval times, contain supernatural creatures, knights, guilds and likeable, attractive main characters. If you liked one of them you will surely fall in love with the other.