One of SAR's main uses is for timing runs. Setting in Explorer to ensure file extensions are shown (Should be enabled)

If it isn't updating, run it as an admin.

LiveSplit sometimes needs to be ran as an admin on your machine to work.

This will interfere with SAR's autosplitter.

Be sure to disable the Autosplitter built into LiveSplit through the Edit Splits.

If Reset isn't greyed out, redownload the ASL from the link above.

Ensure the Start & Split option boxes in the Autosplitter's settings are checked (the reset box should be greyed out).

asl file, not a text file, and try remaking the file to ensure there are no issues.

Attempting to run LiveSplit while it's still located in its original ZIP file will cause issues, be sure to extract.

Right click on LiveSplit, and hover over ' Compare Against', and select ' Game Time'.

Select Scriptable Auto Splitter and navigate to the file.

Select the large + icon at the top left.

Open LiveSplit with Portal 2 splits (splits can be found here).

asl file and place it somewhere you can find. asl files are used to interface with LiveSplit, so using SAR with LiveSplit is fairly simple following these steps. Note: Portal 2 Speedrun Mod (P2SM) uses SAR for timing as well, but the mod reads from your base game install, so you do not need any special installation for SAR with P2SM.

Portal 2 source code