Joint Proceedings of the AIIDE 2021 Workshops These proceedings contain papers from the three workshops from AIIDE 2021: The Experimental AI in Games Workshop, The Workshop on Programming Languages in Entertainment, and The Strategy Games Workshop. More information on each workshop has been provided below. The Experimental AI in Games Workshop This year, the workshop received 19 submissions, and accepted 13 of those submissions. Program Committee • Aaron Reed - Independent • Mark Riedl - Georgia Tech • Adam M. Smith - UCSC • Matthew Guzdial - University of • Ahmed Khalifa - NYU Alberta • Alex Zook - Blizzard • Max Kreminski - UCSC • Allison Parrish - NYU • M Charity - NYU • Amy Hoover - NJIT • Michael Green - NYU • Anne Sullivan - Georgia Tech • Michael Mateas - UCSC • Antonios Liapis - University of Malta • Miguel González - IT University of • Anurag Sarkar - Northeastern Copenhagen • Ben Samuel - UNO • Mike Cook - QMUL • Brian Magerko - Georgia Tech • Mirjam P. Eladhari - Södertörn • Chris Martens - NCSU University • David Thue - Carleton University • Peter A. Mawhorter - Wellesley • Duri Long - Georgia Tech • Philip Bontrager - NYU • Gillian Smith - WPI • Quinn Kybartas - McGill University • Ian Horswill - Northwestern • Rafael Bidarra - TU Delft • Isaac Karth - UCSC • Raluca Daniela Gaina - Queen Mary • James Ryan - Carleton College • Rogelio E. Cardona-Rivera - • Jim Whitehead - UCSC University of Utah • Julian Togelius - NYU • Sam Earle - NYU • Julie Porteous - RMIT • Sasha Azad - NCSU • Justus Robertson - NCSU • Stella Mazeika - Proxi • Kate Compton - Northwestern • Stephen Ware - University of • Kristin Siu - Georgia Tech Kentucky • Lisa Soros - NYU • Vadim Bulitko - University of Alberta • Mads Johansen - IT University of Copenhagen • Mark J. Nelson - American University The Workshop on Programming Languages in Entertainment This year, the workshop received 14 submissions, and accepted 12 of those submissions. Program Committee • Sarah Groff Hennigh-Palermo - New York University • Rogelio Cardona-Rivera - University of Utah • Robert Zubek - SomaSim • Mike Sperber - DeinProgramm • Michael Cook - Queen Mary University of London • Max Kreminski - University of California Santa Cruz • Mark Santolucito - Barnard College • John Aycock - University of Calgary • Jim Whitehead - University of California Santa Cruz • Jacques Carette - McMaster University • Halley Young - University of Pennsylvania • Gillian Smith - Worcester Polytechnic Institute • Diego Perez-Liebana - Queen Mary University of London • Charlie Roberts - Worcester Polytechnic Institute • April Gonçalves - Roskilde University • Alan Jeffrey - Roblox • Adam Smith - University of California Santa Cruz The Strategy Games Workshop This year, the workshop received 2 submissions, and accepted 2 of those submissions. Program Committee • Michael Buro - Univ. of Alberta • Santiago Ontañón - Google • David Churchill - Memorial Univ. • Nathan Sturtevant - Univ. of Alberta • Levi Lelis - Univ. of Alberta • Florian Richoux - AIST • Mike Preuss - Univ. Münster • Nicolas Barriga - Univ. de Talca • Kevin Dill - Lockheed Martin • Julian Mariño - Univ. de São Paulo • Zeming Lin - Facebook • Julian Togelius - NYU • Yaser Norouzzadeh - Tilburg University • Pieter Spronck - Tilburg University • Hector Munoz-Avila - Lehigh University • Simon Lucas - Queen Mary Univ.