If you're looking for the best Gate fanfiction, this story is for you!

1. Gate: Operation Tiger Strike

When the portal opens and the invasion begins, war breaks out immediately. Unfortunately for the invaders, there is more than one army waiting for them on the other side of the portal. Military forces from around the world have come to protect Japan from the invasion, and the results of this war are catastrophic. 

2. Here We Go Again

In this story, the US military joins Japan in their battle with the invaders from the portal. Though they are a strong military force, as they battle the unknown, they struggle to make headway. War is not easy when you have no idea who or what you are fighting against. 

3. Gate: And Thus the UNDF Fought There

This story takes place 43 years after an alien invasion that destroyed the earth. Humanity is still recovering when a portal opens in Iceland. Through this portal comes an army that is prepared to invade. Iceland quickly falls and is taken over by this mysterious army. 

4. The Janus Campaign

In this fanfic, the invasion from the portal did not just affect Japan, it changed the entire world. The repercussions of the invasion were much more far-reaching than anyone thought possible. Now, a large defense force is being sent to the other side, and they have no idea what they will be facing. 

5. Operation Marteau de Justice

This fanfiction takes place in France rather than Japan, and the portal has opened somewhere in the country. They are constantly bombarded with attacks, and their defenses are not strong enough to keep them back. The most recent attack, however, seems different from the others.

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