Just thought I would make a guide on how to play Portal 2 with tunngle, since I haven't done any in a while. It's a program similar to Hamachi and Garena. Okay, Lets get started. There is also a list of console commands for the co-op maps at the end of the guide.
What you'll need
Portal 2
Tunngle
Step One
Register for Tunngle, download and install.
When you are installing it's going to ask to create a new network, allow it.
Step Two
Now before your able to play you're going to have to forward the port 11155
After that start up Tunngle, click on System then Options and finally Test
If it says The selected port is open and accepting connections then you're set
Step Three
Now in the Tunngle Network Search bar type Portal 2, press enter, and double-click a channel
You should see other people in the channel
Step Four
Before you start Portal 2 you need to right-click the shortcut, go to Properties and after whatever it says in target type "-console" and press OK, It should look like this
Step Five
Now you're ready to play Portal 2
Note* Whenever you want to play Co-op you must be on Tunngle and in a channel with the person you want to play Co-op with
Start Portal 2 and you should have a console window now.
Now I'm going to tell you how to host and join.
Note* The person joining should always join before the host, because the person joining can load for as long as they want. The host will disconnect after he loads if no joins while hes loading.
Joining
When you want to join a friend or person in Tunngle tell them to give you their Tunngle IP, It's at the bottom left
Once you have their Tunngle IP go into Portal 2 and in the console type connect <Tunngle IP> and press enter and wait for the host to do their part
Now you both should load and will be in the game
Hosting
When you're hosting you will need to give your partner your IP (Picture above on where to find it)
After he puts it in the console and presses enters you are going to need to type the map
In your console type what map you want to play, Example map mp_coop_start
Press enter and you both should load and will be in the game
Note* After you finish the last level on the chapter it will take you guys to the hub, the host will have to choose the next chapters map via console and his partner might be disconnected, if that happens just connect to the host again asap
List of Co-op Maps
Code:
CHAPTER 1
map mp_coop_start
map mp_coop_lobby_2
map mp_coop_doors
map mp_coop_race_2
map mp_coop_laser_2
map mp_coop_rat_maze
map mp_coop_laser_crusher
map mp_coop_teambts
CHAPTER 2
map mp_coop_fling_3
map mp_coop_infinifling_train
map mp_coop_come_along
map mp_coop_fling_1
map mp_coop_catapult_1
map mp_coop_multifling_1
map mp_coop_fling_crushers
map mp_coop_fan
CHAPTER 3
map mp_coop_wall_intro
map mp_coop_wall_2
map mp_coop_catapult_wall_intro
map mp_coop_wall_block
map mp_coop_catapult_2
map mp_coop_turret_walls
map mp_coop_turret_ball
map mp_coop_wall_5
CHAPTER 4
map mp_coop_tbeam_redirect
map mp_coop_tbeam_drill
map mp_coop_tbeam_catch_grind_1
map mp_coop_tbeam_laser_1
map mp_coop_tbeam_polarity
map mp_coop_tbeam_polarity2
map mp_coop_tbeam_polarity3
map mp_coop_tbeam_maze
map mp_coop_tbeam_end
CHAPTER 5
map mp_coop_paint_come_along
map mp_coop_paint_redirect
map mp_coop_paint_bridge
map mp_coop_paint_walljumps
map mp_coop_paint_speed_fling
map mp_coop_paint_red_racer
map mp_coop_paint_speed_catch
map mp_coop_paint_longjump_intro
If you have a problem or question post it here, I will try to help and answer your questions.