Sword Art Online, Fate/stay night: Unlimited Blade Works Recommendations
Similar death game scenario, similar flashy animation, even a romance story with a Tsundere. Pretty much everything people like about SAO is in Fate/Stay Night: Unlimited Blade Works, but better.
I know that these two anime a very different but they do both involve swords. In each anime the mc has fight stronger and more powerful opponents. Both anime also have the same voice actor, Bryce Papenbrook voicing the main character.