Portal 2 LAN co-op with one account
From WickyWiki
Source:
Start with the guest machine, this machine will play P-body - the orange robot:
- Launch Steam in offline mode.
- Start Portal 2
- Enable the developer console under 'advanced keyboard options'.
- Enter the developer console by pressing the back-quote (`) key.
On the host machine, this machine will play Atlas - the blue robot:
- Launch Steam in online mode.
- Start Portal 2.
- Enable the developer console
- Select "Play cooperative game" from the main menu.
- Select "Standard co-op"
- Wait for the "Invite friends" page to appear.
- Enter the developer console by pressing the back-quote (`) key.
- Type:
sv_lan 1
On the guest machine type:
connect <IP address of host machine>
On the host, for the calibration level:
map mp_coop_start
To go to the hub immediately:
map mp_coop_lobby_2
