SteamPriorityLauncher

Launches a Steam game, then sets its priority.

Installation

1. Download the latest EXE from here.
   Note: If you've already done this once, you don't need to do it again. Just create a new shortcut to the same EXE.
2. Right-click on the EXE, and then select "Create shortcut".
3. Right-click on the newly created shortcut, and then select "Properties".
4. In the "Target" textbox, add the following:
   -gameID <Steam game ID> -gameExe <name of the game's main EXE>
   If you don't know the name of the game's main EXE, run the game normally, open Task Manager, and look for the game in the list. Then, right-click on it and select "Properties". You should see the EXE name in the first textbox.
   Example:
   
   Contents of "Target": SteamPriorityLauncher.exe -gameID 440 -gameExe hl2.exe -priority A
   This will launch Team Fortress 2 with priority "Above Normal".
5. Optionally, rename the shortcut and give it a proper icon.
6. Select "OK".
7. You're done!

Options

To see the launcher's options, simply run it using your preferred command line with no options.

-gameID

The Steam ID of the game you want to launch. Required.

-gameExe

The name of the game's main EXE. Required.

-priority

The game process' new priority.
Valid values are:

• L - Low/Idle*
• B - Below Normal*
• N - Normal
• A - Above Normal
• H - High*
• R - Realtime* (requires admin privileges, may cause system instability!)

(* - not recommended)
If this option is not specified, the priority will be set to A (Above Normal).

-affinity

What cores the game process will be allowed to run on.
This option takes a list of cores, where 0 is core #1. Every number in the list is separated by a semicolon (;).
If this option is not specified, the process will be allowed to run on all cores.
Entries that aren't valid decimal numbers are evaluated to 0.
Invalid entries (I.E selecting core 4 [actually 5] on a quad-core processor) are ignored.
If the given core list evaluates to nothing, the launcher will error out.
You won't need to set this option in most cases.