Visit this URL while logged in your steam account: https://store.steampowered.com/account/licenses/
Hit F12
, click on the "Console" tab and paste it into the prompt)
a=document.createElement`a`;a.href=URL.createObjectURL(new Blob(["Date,Item,Acquisition Method\n"+[...document.querySelectorAll('.account_table tr > td')].reduce((p,e,i)=>(p[~~(i/3)]=(p[~~(i/3)]||"")+'"'+e.innerHTML.trim().replace(/<\/?[^>]+(>|$)/g,"").replace(/\s+/g," ").replace('"','""').replaceAll(" Remove ","")+'"'+(i%3==2?"":","),p),[]).join`\n`],{type:"text/plain"}));a.click(a.download="steam-games-list.csv");URL.revokeObjectURL(a.href)
This will immediately download a CSV file with all your games with:
- Date (when you acquired the game or DLC)
- Title
- Acquisition Method