DevLaunch

For mod developers. Skips Lethal Company's launch menus and goes straight into a game, so several test copies on one computer can end up in the same lobby.

• Who needs it: each test copy. Players don't.
• Config: the Label section sets how the label naming each copy looks.

It reads the game's command line and does nothing unless one of these is there:

• --lan or --online picks the launch mode.
• --host hosts a lobby.
• --join <address> joins the LAN game at that address, retrying while the host loads.
• --tile <n>/<count> switches to a window and puts it in cell n of a grid with count cells.

With any of these, the window title and a corner of the window show which copy it is: Host, then Client 2, Client 3 and so on. The Label settings turn either off, and pick the corner, colour and size.

To run a host and a client on one computer, start one copy with --lan --host --tile 1/2 and another with --lan --join 127.0.0.1 --tile 2/2.

In Mortar

The Test button on Mortar's Develop tab does this for you: one copy hosts and the others join. It adds DevLaunch to the profile if it's missing. The arrow beside it picks 1 to 4 copies, and the profile remembers the choice. Test copies keep their own saves, so yours aren't touched.