I had this document sitting around for a while, so I thought I'd share it here just FYI:
Sadly, the links to the saintsrow.com forum no-longer exist.
Code:
SAINTS ROW GAME VERSION HISTORY (VOLITION / STEAM)
These are official Volition patch numbers for SR3 and SR4.
Saints Row: The Third
See Volition "PC Patch History / Notes" here:
http://www.saintsrow.com/threads/show/28866779
Initial Release (USA): 2011-11-15
http://www.pcgamer.com/saints-row-the-third-released-in-north-america/
Patch 1: 2011-11-23
http://store.steampowered.com/news/6849/
Patch 2: 2011-12-12
http://www.saintsrow.com/community/go/thread/view/136781/28764057/PC_Patch_2_Released_-_1212
http://store.steampowered.com/news/6979/
Patch 3: 2012-01-17
http://www.saintsrow.com/community/go/thread/view/136781/28850569/PC_Patch_3_-_Jan_17th
http://store.steampowered.com/news/7185/
Patch 4: 2012-02-22
http://store.steampowered.com/news/7398/
Patch 5: 2012-05-25
https://www.saintsrowmods.com/forum/threads/876/
Saints Row IV
See Volition "Saints Row IV patch notes: PC" here:
http://www.saintsrow.com/threads/show/30106749
Initial Release (USA): 2015-08-16
http://store.steampowered.com/news/11290/
Patch 1: 2013-08-22
http://steamcommunity.com/games/206420/announcements/detail/2109096234909112413
https://www.saintsrowmods.com/forum/threads/3432/
Patch 2: 2013-08-27
http://steamcommunity.com/games/206420/announcements/detail/2109096427721722303
https://www.saintsrowmods.com/forum/threads/3915/
Patch 3: 2013-08-30
http://steamcommunity.com/games/206420/announcements/detail/2109096961093340679
Patch 4: 2013-09-16
http://steamcommunity.com/games/206420/announcements/detail/2089957861444570252
https://www.saintsrowmods.com/forum/threads/4841/
Patch 4.1: 2013-10-10
http://steamcommunity.com/games/206420/announcements/detail/2037043172214332234
https://www.saintsrowmods.com/forum/threads/5210/
Patch 5: 2013-10-21
http://steamcommunity.com/games/206420/announcements/detail/2035917913388551196
Patch 6: 2013-11-12
http://steamcommunity.com/games/206420/announcements/detail/1892930523746177195
Patch 7: 2013-12-10
http://steamcommunity.com/games/206420/announcements/detail/1891807073742563670
Patch 8: 2014-01-21
http://steamcommunity.com/games/206420/announcements/detail/1876048276262521224
https://www.saintsrowmods.com/forum/threads/6027/
Patch 9: 2016-11-22 "Patch released with Workshop support"
http://steamcommunity.com/games/206420/announcements/detail/341540564442677295
https://www.saintsrowmods.com/forum/threads/14725/
Patch 10: 2016-11-23 "Follow up patch released to fix missing save file issue"
http://steamcommunity.com/app/206420/discussions/0/152390014778733443/
https://www.saintsrowmods.com/forum/threads/14734/
Patch 11: 2016-11-24 "Follow up patch released to fix saving problems
Build #1478224 (not saving, storage error, autosave infinite loop)"
http://steamcommunity.com/app/206420/discussions/0/152390014786981813/
https://www.saintsrowmods.com/forum/threads/14734/
Patch 12: 2016-11-30 "Patch release that reenables the creation of .mdmp
Build #1491355 files in the game root on crash."
http://steamcommunity.com/app/206420/discussions/0/152390014786981813/
https://www.saintsrowmods.com/forum/threads/14734/
Patch 13: 2016-12-05
Build #1498298
https://www.saintsrowmods.com/forum/threads/known-issues-and-changes.14438/
Patch 14: 2017-01-18
Build #1575813
https://www.saintsrowmods.com/forum/threads/known-issues-and-changes.14438/
Patch 15: 2017-01-29
Build #1598139
https://www.saintsrowmods.com/forum/threads/known-issues-and-changes.14438/
Saints Row: Gat Out Of Hell
Initial Release (USA): 2015-01-22
http://store.steampowered.com/news/15553/
Patch 1: 2015-01-22
http://steamcommunity.com/games/301910/announcements/detail/239023424894365060
Patch 2: 2015-04-15
https://www.saintsrowmods.com/forum/threads/saints-row-gat-out-of-hell-update-2.10186/
http://steamcommunity.com/games/301910/announcements/detail/204128231981856808Sadly, the links to the saintsrow.com forum no-longer exist.