As part of the creative modalities, play therapy offers a therapeutic mode far diagnosis, assessment, and treatment interventions. The purpose of this paper is to critically review three play therapy interventions:The Developmental Play Assessment, the Marschak Interaction Method, and the Family Systems Test. A brief introduction to each assessment will be presented. Additionally, validity and reliability data will be addressed. The overall evaluation will include the assessments desirable as well as undesirable features, which is of critical importance to play therapists and those therapists using play as a method of diagnosis and assessment.