Shining Tears X Wind

Main characters get drawn into another world and become the saviors. 

Both feature a large cast and a unique(ish) fantasy world. The females of either series also double as weapons. So that's fun too. 

actually genres aren't very similar, but their stories are very alike: 1. people are summoned in another world 2. there are dangerous demons in that world 3. characters have some similarities 4. returning to their own world is very dramatic but everything end happily! ^^ 

A lot of different beautiful and powerful swords. 

RPG elements. 

In first episode, the staff from Shining Tears X Wind shows up. On the beginning. 

Both series revolves around the MC getting dragged into another world with fantasy like setting involving adventure and magic. Zero no Tsukaima contains more of the comedy and romance part while Shining Tears X Wind contains more of the action and emotional drama.  

It's obvious, both have teenagers transported to another world with hot girls, best friends fighting each other on different groups. Both are good and if you like one then you'll like the other. xD 

OMG its same Main guy extract weapons from his friends its just Guilty Crown is sci-fi ,Shining Tears is Fantasy 

Both have an RPG-ish kind of feel (.hack//Roots for obvious reasons) Similar soundtracks, landscapes, and character designs 

OJA is a bit younger, but they're both about different worlds, and even go so far as to both have Elde as the name of one of the worlds, if you like this theme, you'll like both animes... not as much hotty hot hotty manness in OJA though ;P 

They both have a magical genre and an adventure to save the world, except thatthe main characters are opposite genders. The stories start off with no one knowing anything and as the story progresses, the characters change and find out more about the past and such. 

Guy goes to a different world, makes friends, travels, and kicks ass. Only difference is STxW is more adult-y... 

both are based on PS2 RPGs in which there are those half beasts and cute girls in the party with those amazing swords and cryptic/poetic clues some beautiful/whoever it was leave behind to save the world... etc. etc. etc.... ^_^ theay also have the letter "X" on their titles and starts at letter "S" ^_^ 

Both are from good RPG and has the same tematic and also both have nice Swords and Girls 

Adapted from SEGA RPGs.