In this video tutorial : 4 Showdown Glitch Tutorials
out of the map
1) go south-east of the map and find a market stall
2) jump on it and now look to the left, there is a wooden plank
3) run and jump right next to it and you will find yourself on a very small ledge
4) look to the left and walk further to the end of the plank
5) there will be a small ledge next to you, jup on the last part of it
6) now take out your rocket and use the rocket jump on the building
7) you can now walk out of the map
under the map
1) just do the glitch above
2) find a spot where you fall trough the ground
3) jump in and and you will find yourself under the map
on top of the buildings
1) go to the middle of the map (be sure you take rockets with you)
2) you should find a wooden platform somewere
3) jump on the platform and take out your rocket
4) do the rocked jump on the wall on your back
5) you are now walking on the middle building
outside map v2
1) go north of the map where you see some wooden planks over the road
2) go op the stairs and jump over the railing
3) go untill you can go further anymore and look to the left
4) walk over the wooden plank and let a friend crouch against the wall
5) jump on his head so you get on the house
6) now use your rocket for the second wall
7) rocket hump on it and you can walk around on top of the building
look to the left and you will see a border on the wall on the other side
9) jump on it and walk untill you can’t go further anymore
10) you can now jump down and go out of the map