The use of conventional student worksheets makes students feel bored so that students’ mastery of physics concepts is low. Then it takes the development of student worksheets that are oriented towards guided inquiry based on educational games. The purpose of this study was to develop an educational game-based guided inquiry student worksheet using macromedia flash, and to identify teacher and student responses to the educational game-based guided inquiry worksheet. This study uses research and development adapted from Borg and Gall. Borg and Gall developed detailed steps (1) research and information collecting, (2) planning, (3) developing preliminary forms of product, (4) preliminary field testing, (5) playing product revision, (6) playing field testing, (7) operational product revision, (8) operational field testing, (9) final product revision, (10) dissemination and implementation. But in this study only reached stage 7 because of limited time. The average percentage score of the validator team on the worksheet of guided inquiry-based educational games gained 85.39%. The average percentage score of the validator team against the educational inquiry-based student worksheet obtained 85.39% with valid criteria. while the percentage of teacher responses to student worksheets obtained 66.67% considered very practical and 33.33% considered practical. The percentage of student responses of 45% considers very practical, 50% considers practical and 5% considers quite practical. it can be concluded that the development LKS guided inquiry-based educational game is already valid and very practical to use learning.