Asheron's Call was released by Turbine Entertainment in 1999. It was a groundbreaking MMO, and while it ultimately failed to beat its competition, it was in many ways a more impressive and ambitious game than its peers.

ACEmulator (where you can learn how to play Asheron's Call today)
https://emulator.ac/

Sources:
Game Developer Magazine PostMortem: https://www.gamedeveloper.com/design/...
The Turbine Story: http://www.mit.edu/~jonmon/Business/T...
CD Mag Asheron's Call Interview: https://web.archive.org/web/200111210...
MSN Zone interview with Toby Ragaini: https://asheron.fandom.com/wiki/Micro...
Interviewing Asheron's Call's Shard Slayer: https://massivelyop.com/2018/02/28/in...
Computer Gaming World Issue 159: https://www.cgwmuseum.org/galleries/i...
Jason Booth's .plan file: https://web.archive.org/web/200102021...
MSN Gaming Zone / Asheron's Call awards: https://asheron.fandom.com/wiki/Micro...
Interview with Jason Booth: https://www.iasig.org/pubs/interviews...
Asheron's Call Archive: https://www.asheronsarchive.com/scree...

Video sources:
The last moments of Asheron's Call    • The last moments of Asheron's Call  
Remember this? Mplayer.com    • Remember This?  Mplayer.com  Early ...  
Asheron's Call PC Gameplay Episode 1
   • Asheron's Call 2 [PC Gameplay] Episode 1  
30 minutes of E3 1996
   • 30 minutes of E3 1996  
Asheron's Call Shards of the Herald
   • Asheron's Call: Shard of the Herald (...  
Ripper's Tortured Psyche: History of Asheron's Call Darktide:    • Ripper's Tortured Psyche: History of ...  
Meridian 59 Server 101Gameplay    • Meridian 59 Server 101 Gameplay Part I