Well-known producer of transmedia content, Alan Sawyer, passed away on the weekend.

Sawyer, who also ran Toronto consultancy Two Solitudes as well as production shingle Changing Channels, was 51.

Some of his recent credits include Endgame Interactive, on which he was concept creator, executive producer and creative consultant, according to this Changing Channels website. The project received a 2012 International Digital Emmy and a 2011 AToMiC award, in addition to Rockie, Webby and Gemini nominations.

Sawyer was also concept creator and development producer on Drunk and on Drugs: Happy Fun Time Hour, and consulted on the interactive components of My Babysitter’s A Vampire, In Real Life, D-Day to Victory, Cross Country Fun Hunt, The Next Step and Grojband.

His friends and colleagues have been posting on Twitter and their personal blogs about Sawyer, saying he will be “dearly missed.”

Sawyer’s older brother, sci-fi/fantasy author Robert J. Sawyer, wrote on his website that Sawyer passed away on Saturday night:

“He was born September 12, 1961, in Toronto, and died in that city June 8, 2013, at the age of 51.

Alan was diagnosed with lung cancer last September, and by the time it was diagnosed, it had already metastasized to his brain, abdomen, and sternum. He passed away Saturday, June 8, at 10:00 p.m., at home, after a very rapid decline. He had been well enough to attend a play at the Shaw Festival in Niagara-on-the-Lake, Ontario, on Thursday night, and really only went into steep decline three hours before he passed away.

Alan was 16 months younger than me. A digital-content producer, he won an International Emmy Award for his work on the webisode companions for the TV series Endgame. He had no children, but is survived by his wife Kim. His website: twosolitudes.com.”

Notices that appear in the Toronto Star and The Globe and Mail include details about visitation and a celebration of life.

with files from Danielle Ng-See-Quan