In the end of the game, Ocelot made a mysterious call to another informer revealing their next plan... You should know what would happen next...

big boss and eva died. .(another spoiler).
and he also told me akiba is another snake.

He kicks Snakes ass and gives him a CQC Hug

MGS4 have a patch game... trophies support and add-on scene for act6 and act7...
For act 6 & 7 Raiden is playable... where player start at the Market Place and Vamps boss fighting

ACT 4, Liquid use the Outer Haven the ramp into snake, raiden came out of nowhere and prevent the outer haven from ramming into Snake

Liquid was defeated with only a few punches, meryl married Johnny, Sunny met a new fren, everyone was together but not Snake, he went to the grave to find Big Boss and the person behind all this conflicts.. after that credits, some funny conversation btw ocatacon and snake

@ the main screen , go to the extras, password type: 4554013 to unlock a special content

snake walks and run but doesn't know how to glide across the ground

Make it to the highest point @ the start of ACT 5 in 3 minutes, defeat the enemy there and she will drop a Playgal magazine, the only 1, u can use it to lure the female enemies or use it to lure any of the bosses in the game. Any shot after luring the bosses is a 1 hit kill

Complete the game without hurting anybody in 3 hrs on Big Boss Level , without any means of attacking (grab,sleeper hold, firing any gun, any actions that considered aggressive and dangerous) and u will unlock a secret emblem, "Cheater"