Alastair Duncan is probably best known as Mimir, the smartest man in the world, in the games God of War and God of War Ragnarok, as well as Celebrimbor, the creator of the rings of power, in Shadow of Mordor and Shadow of War and Senator Armstrong in Metal Gear Rising: Revengeance, a game that is more popular today than when it was released 10 years ago.

After working as a nursing auxiliary in the Argyle and Bute Mental Hospital, studying science at Dundee University for a year, and then working in the anatomy department at Glasgow Vet School, Alastair Duncan studied acting at Queen Margaret University in Edinburgh.

In 1983 he made his film debut in Bill Bryden's Ill Fares the Land and his TV debut playing the naive sidekick Det Sgt Neil Livingstone to Mark Mcmanus's world weary title role in the Scottish Television series Taggart. He left the show after the first five seasons and in 1992 he starred opposite Rutger Hauer in the darkly atmospheric British sci-fi cult classic Split Second, playing Det. Dick Durkin. He then starred in the film The Fifth Day in Venezuela before moving to Los Angeles. Since then he has guest starred in episodes of Buffy the Vampire Slayer, Angel, Tracey Takes On, Babylon 5, ER, The Division, Westworld, CSI, NCIS, Mad Men, The Mentalist, and many more as well as the movies Dead Man's Walk, Trick of the Eye, Sleeping With Strangers, Tower of Terror and The Girl With the Dragon Tattoo.

In the early 2000s he segued into voice acting playing Alfred in 5 seasons of the animated series The Batman and 8 subsequent Batman films and video games including the recently released Batman: The Long Halloween and Justice League: Cosmic Chaos. His work in animation took him into video games where he has played a multitude of roles in a myriad of games.