Some runners might not be aware of this, but this game has a SDA thread, in which many of the current strats were born.
Among them, there was a 100% route made by Sellz90, which attempts to make the run linear.
Here's the link to the original post https://forum.speeddemosarchive.com/post/saints_row_the_third_78.html#saints_row_the_third_78
And here are my splits based on that route, which I used in my 11:08 run https://splits.io/2c3t
Current WR (6:31 by Kaadzik) uses an updated route, which utilizes both STAG Takeovers to speed up the process by completing City Takeover in Loren Square and Ashwood, and also comes closer to the current Any% route.
Splits following the route are available here: https://splits.io/30yt
You are rewarded one City Takeover for giving away Josh during STAG Party, and the other one can be obtained as a Lv28 upgrade.
Honestly it's kinda amusing to see the 100% time get cut almost by half with one simple trick :D