The ongoing research project develops a new process and related tools to enhance architectural design and education for sustainability. The new process consists of design, play, and update phases. First, in the design phase, designers (professionals or students) use Building Information Modelling (BIM) for representing architectural geometric information and non-geometric information. Second, in the play phase, designers will play games with their designed BIM model. The BIM model is made accessible to educational games through Application Programming Interface (API) of BIM. Both geometric and non-geometric information of BIM are brought into games as content. Game components such as characters (acting as virtual building users), graphics, sound, physics, artificial intelligence, game logic etc., can be added into the games. The games act as a simulation environment for both human activities and physical dynamics in buildings. Designers will be informed about the evaluation of their design in terms of sustainability and about the general design strategies and specific solutions in an interactive and fun way. Finally, in the update phase, the games will allow designers to modify the design and/or the building usersi behaviours/life styles until satisfactory performance is achieved. The design modification will be transferred back into the architectural design through the same API of BIM.