I was wondering if there was a place to find a list of every WR over time. I see everybody's best time featured proudly on the game's page, but I'm interested in the "WR Progression" list... if you will.

Speedrun.com keeps track of the world record history for games, but it doesn't include tied world records, or records that weren't submitted to the site. You can find this list by clicking on the "Statistics" section on the sidebar of any game, and then crossing off any categories you don't want on the graph. For most new games, this works fine, but older communities often need to put together comprehensive google docs/spreadsheets. The best way to find out about the history of a game is to ask the game's community.