Get into Railing
Left on Seal's Side where the turret is located overlooking the Seals Base, on the Pathway above where you used to be able to get up onto the roofs, There is a soft spot inside the railing, prone and then start moving foward while moving left starting from the start of the railing to the end where you jump up onto the roofs. You will be completely inside.

Grind on Any Rail
Align yourself with the left or right side of a ledge, like the ledges on either side of the bridges. Then look the opposite direction of which side you lined up on, don't look all the way to the opposite direction, just an inch or so, like lets say you were on the left side of the ledge, toward the inside of the bridge, you will have to look to the right, and then you just jump foward and don't touch anything else and you will grind foward automaticly.

Get on Roofs
First find the small wooden ledge not far from the seals spawn near the seals sideroofs. Now you must jump onto that ledge. After that turn around backwards and jump onto the nearby roof backwards. If you jump right, you will jump onto the rooftop.

Get on top of Roofs w/ Shotgunning #1
Requirements: Shotgun and 2 People
At seals spawn there is a short building right in front of you that has a couple windows. (Attatched to old roof jump roof) Go inside with a shotgun, have a person stand on top of you and you can shoot them ontop of that roof. Once up there they can travel to many other roof tops.

Get on top of Roofs w/ Shotgunning #2
Requirements: Shotgun and 2 People
Near the seals spawn to the Left (if yourr a seal) Go to the platform with the Breach door on it (Big red building) have some1 with a shotgun get on and prone. Facing the right balcony thing (where you used to be able to ninja jump) Then have person 2 climb as far to the shotgunners right as possible and blast em up there. Takes Practice.

Get on top of Roofs w/ Shotgunning #3
Requirements: Shotgun and 2 People
Also in the first ninja jump spot, to the right of the seals spawn. Jump on the ledge, prone with shotty have person 2 stand on you and blast em onto that roof.

[Get on top of Roofs w/ Shotgunning #4]
Requirements: Shotgun and 2 People

Refer to the picture on where to shotgun.

[Get Into The Seal's Bridge Rocks]
Requirements: Nothing

Lay prone to the right of the rocks on the ground as close to the wall as you can, and then Crawl in, and then stop when you get stuck, and then keep crawling and stopping until you can move to the left and then crouch and then you got it.

[Get onto Roofs w/o Claymores #1]
Requirements: Nothing

Is the location, it is by the Seals Base. Do the Invisable Box Climb right into the window, you have to get exactly into the window to stay up there. Then when you are exactly into the window, start running foward and position yourself correctly so that you can jump, and when you jump, you can get onto the roofs.

[Get onto Roofs w/o Claymores #2]
Required: Nothing
At any of the two Sniper Tower buildings, if you go up, you will see a window, go into stand and then jump outside the window, which is hard because you usually will fall off and die. Once you get onto the awning, jump to your left or right a little bit, and then you will get onto the roof.

[Get onto Roofs w/ Claymores]
Required: Claymores
The Sniper Tower closest to the Seal's Spawn is where you do this. Go to the breach and then face it, then run and jump off the ledge to your left and then run at the corner backwards, aim your crosshair at the angle formed by the ledge that the breach is overlooking. Then while running, plant your claymore, then get onto the breach, and then jump and blow your claymore and make sure you are running at the angle, and you should fly and get onto the angle, from there you can get onto the roofs.

[Get onto Roofs w/ Ninja Jumping]
Required: Nothing

Refer to the picture, go into that Sniper Building, after destroying the breach. Then, jump out the window onto the ledge, which is quite hard to do but once you do it once or twice, it is easy. Now once you are on the ledge, prone and ninja jump to the roof that the arrow points to inside the picture.

[Muscle Jump]
[Required: Claymores]
[Video: http://www.socomcity.net/uploads/musclejump.wmv ]
If you are in the giant church building, and you go out the exit with no real door on it, you can place a claymore about ten feet away from the other building, facing the door. Then come back towards the church, and run at an angle and jump, at the highest point of the jump, blow up the claymore and you will get on the roof. Refer to video on location.

[Get C4 As Primary]
Required: C4
Go to any of the Sniper Breaches. The only breach that isn't a Sniper Breach is the central and Seal breach. Now, go to the very edge of a ledge on either side of the Sniper Breaches, and look at the door, you will see Plant C4, plant C4 and while you are, turn around and you should fall down and you will have C4 as Primary. You can do many things, like if you get on a turret and wait five minutes without doing anything, it will shoot and you can shoot your primary out of the turret, etc.

[Claymore Jump onto Seal Garden w/ Claymores]
Required: Claymores

From the seals spawn where you can go right and C4 the gate or jump through the window go into that building and go into the little room with the two arch windows. Look out one of the windows and you will see a little ledge with plants/a bush on it, you can plant a clay like 10 feet away from the window then jump and blow it and you should make it.

[Get in threw Breach without Blowing it Up]
Required: Nothing
At the Terrorist Spawn, there is a Sniper Tower that can be reached by climbing up onto the roof, and has no stairs inside of it, you then can jump through the hole on the left and sometimes your guy will make it threw the Breaching Gate.

[Get Into Lag Hole #1]
Required: Claymores and AT-4 Heat/RPG

There is a building around the Seal's Spawn point that has a turret in front of it, get on top of the building like the picture shows, and then plant a claymore in that position, and then take out your RPG/AT-4 Heat and shoot the claymore, make sure the claymore is facing the opposite direction so you get knocked down but as soon as you fly backwards press triangle a lot of times over and over. This might take a few tries but if you do it right, you will be able to get inside the building below you, and then if you walk to the open space that you see, you will fall into the lag hole.

[Get Into Lag Hole #2]
Required: Two People, Shotgun and AT-4 Heat/RPG

There is a building around the Seal's Spawn point that has a turret in front of it, get on top of the building like the picture shows. Once you are in that position, have someone shotgun you backwards so you fly backwards, and while you are flying keep on pressing triangle over and over and you should fall threw the roof into the lag hole.