The aim of this study is to examine the games in ABCya (https://www.abcya.com/) based on the learning trajectories for the development of number concept. To achieve this aim in the study it was examined which ABC educational game application support the learning trajectory and the development level related to number concept of games. This research was designed in qualitative research methodology based on content analysis method. The ABCya application, which includes a dynamic structure, is suitable for manipulation and includes digital game features with mathematical content which make it appropriate to support the mathematical development of pre-school students. At the same time, the games included in this application support the active participation of children and have motivation-improving features. It is seen that the games mostly support the trajectories of the "recognition of number and subitizing" and "verbal and object counting" for the children aged between 4-6. For the trajectory of the "comparing, ordering and estimating numbers" there are games supporting the perceptual and counting comparison and ordinal numbers, but games supporting the estimation skills are limited. It is very important to introduce the digital platforms that include educational game activities to both teachers and families and to inform them about their contribution to academic development of the children. Digital games should be used as an educational tool by parents and teachers in supporting the development of children and their number sense, especially in the learning trajectory for recognition of number. [This study was presented as an oral presentation at the 2nd International Elementary Education Congress held on 23-27 October 2019.]