Btooom!
*yawns from nap* Still talking about SAO, I see. The anime is cool and everything, but if you like an Action/Survival anime, try Btooom! It's about a 22 year old unemployed gamer who...loves gaming. His mother keeps trying to get him a job, but refuses because he is waiting to be a game developer. A person close to the man (his mother) gets a message talking about "If you could get rid of anybody, who would it be...". The mother chooses her son. Her son gets captured and is put in a game called Btooom! What a coincidence! It's the game his team is #10 in the world in! It's different though, he is actually on an island with other people trying to survive as well! They all have 8 grenades and a crystal in their hand. The game is simple. Kill 7 people and you will then have 8 crystals to get off the island. How do you get the crystals? Kill the other person and it pops off their hand. Watch how the main character meets allies and enemies on an abandoned island in this survival game! Oh, the whole "using humans to fight each other on an island" is actually a set up for a game that psychos are making. (I typed this being half-asleep, sorry for any mistakes.)