Hi, Rai here, to find a place in the walkthrough, hit Ctrl+F and type in the pages as follows:

Level 1

Level 2

Level 3

Level 4

Level 5

Level 6

 

Level 1: Hideout.

Goal 1: Knockout 4 GCP guards.
Goal 2: Knock down 2 scaffold poles.
Goal 3: Trash the limosuine.
Goal 4: Knockout 4 Snipers.

When you start the level, go in the direction that Ethan faces
towards the stairs. Theres a GUARD ( Do a flip trick into any person in the game that needs to be KO'd ...A normal jump won't do the trick ). After knocking him out, turn right and
whack another GUARD standing outside a tunnel. Go through
the tunnel and turn left, through the hole in the fence, and towards a big set of stairs. Whack the GUARD at the top of the stairs, then do a 180 turn, and go back down the Left road, where you'll find your last GUARD next to the fence outside the
tunnel.
Go uphill from the fenced area, and when you see the arrow point
into a road to your right, go in that road. On the pavement is some scaffolding. Spot the yellow and black POLE, then jump and grab with circle button. This'll smash it. As soon as you leap off this one, the next POLE is straight ahead...grab it to smash it!
Now, theres a limousine pulled up...time to trash it! Turn right, and head back down to the tunnel where you wacked GCP goon Number 2. The LIMOSUINE is here...grind it and it'll explode!
Now, theres just some annoying snipers to deal with. Follow your arrow to the side of the level where it points at. Go uphill, and you'll see some stairs with 2 noticeboards next to them. Go
up the stairs, and follow the area round, taking out 2 SNIPERS!
After the 2nd sniper, theres a bar suspended above the ground...
grab it and swing to the location of the 3RD SNIPER Take him out, then look in the opposite direction to the quarterpipe against the wall...theres a bar....remember this location for later! Follow your arrow toward the cinema. When you're there, go up the stairs next to it, then jump and grab the bar. Swing up to the cinema ledge and whack SNIPER 4.
Now you've gotta reach the exit. Go back to the roof where you smacked the 3rd sniper, and grab the bar. Swing to the central building, and grind to the top of the huge fallen down pylon thats in the hole in the middle of th building. Swing the pole at the top the pylon, and jump to the EXIT.

 

Level 2: Downtown

 

Goals:
Smash 4 billboards.
Smash 5 surveillance cameras.
Whack 5 GCP guards.
Destroy 3 trucks.

At the start of the level, go straight forward, and trick through the first billboard. Go to the end of the platform, and grab the pole...swing and
jump to the big curved ramp ahead, go round it, then go up the wood
ramp and trick through the 2nd billboard. When you land, go up the
stairs, jump and grab the pole, then swing up and trick through Billboard
3. Find the gap in the bowl, and grab the pole thats in the gap. Swing to
the green roof, and let yourself go forward until next to billboard 4.
Trick it.
Go down the stairs, and left through the blue alley, go up the stairs, and
go forward, till you see your 1st camera on a pole. Grab it to smash it.
Keep going forward to find Surveillance camera 2. After smashing, go forward, jump over the wall, and staight to the next walkway for your
3rd Camera. Go straight forward, and up the ramp for CAMERA 4.
Go down the other side of the ramp, and go up the first set of stairs. Jump off
of them near the top and grab the pole. Swing then jump to the next pole.
Repeat till you are on the roof with Camera 5!
After smashing this, boost down the stairs and onto the road. Go downhill,
and you'll see your first truck coming uphill. Grind the side of the truck to blow it up. For Truck 2, go down the road and you'll see it parked straight ahead....
smash it! Lastly of all, Truck 3 can be found in the area where the green roof and blue alley is.
Now you've got to whack some more GCP guards.
They're fairly straightforward to find.
For the exit, go to where u started, go further up the stairs, and grind a curved slope....grind the power lines after u fall off, then swing the bar at the end and jump to finish the level.

 

 

Industrial:
level 3:

 

5 GCP goons.
3 Sattelite dishes.
3 Trucks.
4 Spotlights.

Speed to the bottom of the hill, Whack the first GCP goon.
Go down the right path, and up the last dirt ramp, through
the hole in the wall, to whack ur 2nd GCP goon. Do a 180 turn,
and follow your arrow up the set of stairs. Go across the walkway,
whacking the 3 remaining GCP guards.
Next is satellite Dishes- You gotta grind 'em ( The outside ),
Jump off the walkway, and go back towards a dirt ramp that faces ur
first radar. Boost jump off of a dirt ramp to reach it.
For the 2nd radar, go back to the loaction of ur 2nd GCP,
and back onto the walkway you jumped off of. Grind the left rail of the walkway as soon as you've gone up the stairs, and before you hit
the diagonal bend in the rail, jump onto the satellite and grind it.
For your last satellite, go to the loaction of Goon 2 ( Again )
but enter the big building that is coming off of the road.
Find a set of stairs up against a wall, go up them, and swing off
of the bar at the top. When you land on the higher floor, look
for an elevated room....near it is a bar....swing off the bar and
through the glass into a control room. When you're in there, look
opposite the controls to see a big window.....boost jump through it to
land on ( And grind ) your last satellite.

For the trucks, all 3 of them are driving round the road. Find them,
and when you do, grind the rails on the roof of them. Tip: If you can't
reach it, use the roadside rails to get some height.
Last of all is the searchlights ( Swing them ).
Follow your arrow till it points straight at a flight of stairs,
and go up them. When you get up them, do a 180 turn,
and your first searchlight will be on a swingbar. Swing
off it, and onto a platform, Follow it round, jumping the gaps,
and when you see a slope going into what seems like space,
boost jump off of it, and swing your 2nd searchlight ( Suspended
in the air ). You should land on a black slope. Follow it round,
jump off the end, you should see Searchlight 3. Swing it.
For the last searlight, keep going round the path you landed on,
and swing the light suspended just past the stairs ( If you miss 3
and 4, you can reach them by using these stairs. )
For the exit, head back to the middle building. Find the big tower
with yellow and black stairs. Go up the stairs, and swing the bar at
the top of them. Jump off it, and grab the next bar. While swinging this
bar, press L1 to change direction 180 degrees. Leap to the bar
that will be opposite you now. Swing this bar, do the 180 turn
again, and jump to bar number 4. Swing off of this, and grind the big
yellow and black rail to the exit

Level 4: Storage.

Whack 6 GCP goons.
Swing 5 Control panels.
Swing 4 Crates.
Grind 4 loaders.

Hit your 1st GCP GUARD in the tunnel ahead. Proceed onwards, and hit your next
GCP GOON just after the tunnel ends. Follow your arrow to the back of the room,
and make your way up the stairs to GUARD 3. Go up more stairs ( Following your
arrow will help greatly ) and whack GUARD 4. Do a 180 degree's turn, and go up
the stairs ahead of you to find GUARD 5 at the top. Nearby you'll see CONTROL
PANEL 1 ( Black structure with 2 orange lights ). Swing it, and you'll fall down next
to your last GCP GUARD.
Do a 180 turn from Goon 6, and go towards the small iron bar near the wall.
Grind up it to find your 2nd CONTROL PANEL. Jump from the bar and swing
the panel. Continue up to where you Found Control panel 1, and swing it again.
Once you've jumped off it, Move yourself to the right while flying through the air.
Grind the big Pipe ( You can't miss it! ) and jump off it onto the big metal
floor ahead. Swing PANELS 3 and 4 ( Next to a gap ). When you land, turn
left, and grind the yellow and black bars ( Theres 2 side by side they look
like rails ). Halfway along, is a big bar in between the two little ones.
Grind it...thats LOADER 1 sorted! Jump off of this loader at the curve,
and you'll land on a platform containing CONTROL PANEL 5.
2 Of the CRATES are fairly straightforward, and are at the back of the room
( Your arrow points to them ). Use nearby ramps to get near them, then
Swing the chains which hold the crate up.
For Crate Number 3, Go upstairs till you're on the same level as control panel
5. Grind the rail to reach the Control panel 5's platfrom again. Go up the stairs
on this platform, up the ramp, and swing CRATE 3.
For CRATE 4, Go back to where you whacked Guard 6.
Look for the green shipping containers, use the girders to get on top of them,
then at the top, swing your last CRATE.
For the loaders, first of all, go back to the Control panel 5 platform
( yes, again ). Swing the panel to reach some yellow and black bars
( This is LOADER 1, which you should have grinded earlier ).
When you reach the end, turn right, and LOADER 2 will be right there.
Grind it, and when you reach the end platform, turn left, and grind
the other 2 LOADERS ahead.
For the exit, you need to get back to Control Panel 5's platform again ( Sorry,
but this is the last time ). Use a combo of the loaders and the control panels
to get back to the metal platform where you swung Loaders 3 and 4.
Look for a crane, and opposite it, a gap in the rails that block this platform.
Swing the bar at the top of the gap, and jump to the Crane Bar. Grind it,
and when you near the end, Swing another bar when you're just below it.
Jump from the bar, then move right slightly, and as you fall, press Triangle
to grind the green girders. Jump off of these and through the glass window to
triumph!

 

Level 6.
penthouse.
One objective.....ESCAPE!!!
Go straight forward, and through the door.
Grind the rail down the stairs ( Tip: Tap R1 as fast as you can to fly down rails,  at massive speeds .) and at the end, jump up and grind the big light.
Transfer from light to light, until you
reach another door. Turn right,
and boost jump over the huge gap.
Go through the door, zoom through
the office, and when you reach the end,
BOOST round the fullpipe. Go through the
vent at the end, and grab the pole you see
at the end of it, then grind the rail ahead of it.
Jump and grab the next pole, jump off it, and
grind again. When you land, jump from
ledge to ledge. When you reach the next
big jump, boost jump so that you land on the
sticky out rail ahead ( Grind it Duh ).
Go through the door, grab the pole,
then jump and grab the next pole ahead....
Keep doing this till you land in a red vent.
Go through the room, and boost jump to
a metal ledge ahead. Jump from this towards
the buildings and fall through a glass roof.
Go ahead, down the stair rail, and when you
reach the bottom, you'll need to jump almost
instantly to reach the metal ledge ahead.
Jump to the hall, jump to a swing bar,
transfer to the next one, then turn and jump,
to one behind you, Turn 180 again,
and jump to the last bar. Swing into a room,
then go to the vent at the end.
Jump from rail to rail, grinding them, until
you reach the exit.
Tip: If you're not making it in time, it may be
because you're spending too long swinging
on the poles....just jump off of them
straightaway.