

In this work, we analyze over 70 hours of YouTube videos, where blind content-creators play visual-centric games. We point out the various strategies employed by players to overcome barriers that permeate mainstream games. We reflect on ways to enable and improve blind players’ experience with these games, shedding light on the positive and negative consequences of apparently benign design choices. Our observations underline how game elements are appropriated for accessibility, the incidental consequences of audio design, and the trade-offs between accessibility, agency, and engagement.
David Gonçalves, Manuel Piçarra, Pedro Pais, João Guerreiro, André Rodrigues
CHI 2023 ‑ ACM Conference on Human Factors in Computing Systems, April, 2023
Best Paper Award
We explore the use of games to inconspicuously train gestures. We designed and developed a set of accessible games, enabling users to practice smartphone gestures. We evaluated the games with 8 blind users and conducted remote interviews. Our results show how purposeful accessible games could be important in the process of training and discovering smartphone gestures, as they offer a playful method of learning. This, in turn, increases autonomy and inclusion, as this process becomes easier and more engaging.
Gonçalo Lobo, David Gonçalves, Pedro Pais, Tiago Guerreiro, André Rodrigues
ASSETS 2021 ‑ ACM Conference on Computers and Accessibility
We explore ability-based asymmetric roles as a design approach to create engaging and challenging mixed-ability play. Our team designed and developed two collaborative testbed games exploring asymmetric interdependent roles. In a remote study with 13 mixed-visual-ability pairs we assessed how roles affected perceptions of engagement, competence, and autonomy, using a mixed-methods approach. The games provided an engaging and challenging experience, in which differences in visual ability were not limiting. Our results underline how experiences unequal by design can give rise to an equitable joint experience.
David Gonçalves, André Rodrigues, Mike Richardson, Alexandra de Sousa, Michael Proulx, Tiago Guerreiro
CHI 2021 ‑ ACM Conference on Human Factors in Computing Systems, May, 2021
We share multiplayer gaming experiences of people with visual impairments collected from interviews with 10 adults and 10 minors, and 140 responses to an online survey. We include the perspectives of 17 sighted people who play with someone who has a visual impairment, collected in a second online survey. Our focus is on group play, particularly on the problems and opportunities that arise from mixed-visual-ability scenarios. These show that people with visual impairments are playing diverse games, but face limitations in playing with others who have different visual abilities.
David Gonçalves, André Rodrigues, Tiago Guerreiro
ASSETS 2020 ‑ ACM Conference on Computers and Accessibility
Best Paper Nominee
Inspired by charitable donations, Data Donors, is a conceptual framework proposing the enablement of users with the capacity to help others to do so by donating their mobile interaction data and knowledge.
André Rodrigues, Kyle Montague, Tiago Guerreiro
CHI 2018 ‑ Late Breaking Work - Extended Abstracts of the ACM Conference on Human Factors in Computing Systems, Montreal, Canada, May, 2018
We present audio puzzle games, an interactive way of playing with music by rebuilding a song, just like the original image jigsaw puzzle, broken into pieces which are by turn randomly shuffled. The audio mode design followed a participatory approach starting from a version similar to the visual one, but around music instead of images. We report on an evaluation with 13 blind people using the proposed game application with three different songs randomly distributed.
Jaime Carvalho, Luís Duarte, Tiago Guerreiro, Luís Carriço
MOBACC 2012 ‑ Mobile Accessibility Workshop at MobileHCI 2012
Your shop in the Koala Kingdom is at the brink of bankruptcy, cooperate with your partner to save its future! As the Adventurer, you will explore the dungeons, collecting items and materials. As the Trader, you will manage the loot the Adventurer brings, selling and processing it to unlock more and more content! You will need to work as a team in order to maximize your profit and unlock new powers and abilities.
Date: 2020
Platform: Windows (Adventurer role), Android (Trader role)
Devices: Keyboard, Mouse (no key remapping options), Touchscreen
Language: English, Portuguese
Players: Online two-player only
Accessibility: The Adventurer role implies a challenge depending on dexterity and reflex, where various enemies have to be dodged and defeated to progress. The Trader role implies a challenge with no time restrictions, where the player have to manage various menus (playing on the smartphone) to utilize and craft resources. The game does not include accessibility options.
In this game you are your team's goalkeeper and they are counting on you! They will shoot for you and you have to defend as many shots as possible. Can you do it? To defend, you'll have to do it with Talkback's more advanced gestures.
Date: 2021
Platform: Android
Devices: Touchscreen
Language: Portuguese
Players: Single-player
Accessibility: The gameplay presents an auditory challenge where the player has to perform a gesture to respond to audio feedback.
In this game you are in command of your spaceship and the enemies come against you at any time. You have to listen carefully and sweep to the side in time. Let's see how long you can take it.
Date: 2021
Platform: Android
Devices: Touchscreen
Language: Portuguese
Players: Single-player
Accessibility: The gameplay presents an auditory challenge where the player has to perform a gesture to respond to audio feedback.
Jump the rope using the double tap. The double tap is the gesture used by Talkback to select options. In this game you will be able to practice the gesture while having fun trying to 'beat' your high score.
Date: 2021
Platform: Android
Devices: Touchscreen
Language: Portuguese
Players: Single-player
Accessibility: The gameplay presents an auditory challenge where the player has to perform a gesture to respond to audio feedback.
Bring a friend and venture through the skies together! Will you be the hero of the day? Be the brave Pilot and lead the aircraft through the menacing stormy skies. Play as the crafty Engineer and pay close attention to the surroundings.
Date: 2020
Platform: Windows, Mac
Devices: Keyboard, Mouse (no key remapping options)
Language: English
Players: Online two-player only
Accessibility: One role (the Pilot) implies an entirely auditory challenge (blind accessible) and the other (the Engineer) implies a visual challenge. The game was designed as an inclusive game experience for players with mixed visual abilities.
Bring a friend and explore the bottom of the ocean together! Can you find the lost treasure? Be the brave Pilot and drive the submarine through the frightening underwater caves. Play as the crafty Engineer and man the sonar with care.
Date: 2020
Platform: Windows, Mac
Devices: Keyboard, Mouse (no key remapping options)
Language: English, Portuguese
Players: Online two-player only
Accessibility: One role (the Engineer) implies an entirely auditory challenge (blind accessible) and the other (the Pilot) implies a visual challenge. The game was designed as an inclusive game experience for players with mixed visual abilities.
Social gaming: A systematic review
This work contributes with a systematized view of social aspects that permeate gaming experiences, while outlining directions and implications for future work. It presents a systematic review, covering 263 publications, with a particular focus on previous definitions and approaches, determinants that shape the experience, methodologies, and measurable outcomes.
David Gonçalves, Pedro Pais, Kathrin Gerling, Tiago Guerreiro, André Rodrigues
CHB 2023 ‑ Computers in Human Behavior, July, 2023