Tutorial Having multiple OMSI installs

Road-hog123

An Orange Bus
Administrator
UKDT
Dec 10, 2015
1,784
There are a number of benefits to having multiple copies of OMSI:
  • If installing new content to a clean copy of OMSI, that content can't break any other installed content because there isn't any.
  • If packaging up content for release, you can install it onto a clean copy of OMSI and immediately be able to tell whether it works with the requirements you've listed.
  • An OMSI install with 1 or 2 maps installed starts much faster than one with 10 maps.
  • An OMSI install with 1 or 2 buses installed loads the bus selection window much faster than one with 10 buses installed.
  • If your OMSI install is broken, you can keep a backup of all of the maps and buses you had installed while installing OMSI a-fresh.
  • If you want to uninstall a map with a dedicated OMSI install, you can just delete the whole OMSI install and not worry about what you might be breaking.
  • If you're testing alpha or beta content you can install it somewhere where you're not going to accidentally reveal it on a stream and you can ascertain if the author has included all that they needed to.
So how do you do it?
It's simple!
When you launch OMSI, Steam tries to start "OMSI 2\Omsi.exe" so, if you rename your "OMSI 2" directory to anything but that, Steam can't see your OMSI install.
If you then right-click on OMSI 2 in Steam, you can use go to the Properties menu and either uninstall the game (which will delete the "OMSI 2" directory, which no longer exists anyway because you renamed it) and install it again, or you can "Verify integrity of game cache", which will re-download any files that don't match what Steam have on their servers, which will be the entire game because the "OMSI 2" directory doesn't exist any more.
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Once you have a clean install, rename it something sensible like "OMSI 2 - Clean" and then you can make as many new clean copies of OMSI as you want without re-downloading it simply by copying and pasting that install.

Whichever is currently named just "OMSI 2" will be run when you launch OMSI.

If you're feeling particularly snazzy, you can also leverage symlinks to make it easier to switch installs or to reduce the overall size of the collective installs, but this requires advanced knowledge of the Windows directory system, so won't be included in this tutorial.
 
Last edited:

Rob_Devs

All time legend/Salisbury Reds Driver
Jan 29, 2016
409
@snipermaster1001 You need to rename the first install to something else otherwise it is still gonna load the first one as suppose to the second one... Rename the first install to something like "OMSI 2 (insert something here)" then rename the other install to "OMSI 2". Then when you are done with the second install, you can then just repeat the above process to go back to the first install.

Hope this helps

Rob
 

snipermaster1001

New Member
Sep 20, 2018
12
@snipermaster1001 You need to rename the first install to something else otherwise it is still gonna load the first one as suppose to the second one... Rename the first install to something like "OMSI 2 (insert something here)" then rename the other install to "OMSI 2". Then when you are done with the second install, you can then just repeat the above process to go back to the first install.

Hope this helps

Rob
Oh, right so I can't have two simultaneous installs?
 

LH275

𝘺𝘦𝘴
Dec 9, 2016
270
I know this doesn't exactly fit with the theme of this thread but as the picture is there for reference I may as well. So, in Roadhog's picture above on the right hand side there's a tab named "Move install folder", my steam library properties don't allow me to see said tab. I've wanted to move my OMSI folder for a while now but can't for some reason, any thoughts?
 

snipermaster1001

New Member
Sep 20, 2018
12
I know this doesn't exactly fit with the theme of this thread but as the picture is there for reference I may as well. So, in Roadhog's picture above on the right hand side there's a tab named "Move install folder", my steam library properties don't allow me to see said tab. I've wanted to move the folder for a while but can't for some reason, any thoughts?
It's if you have several hard drives for games.