This special project is 1) to develop World Phenomena Game for Grade 3 students 2) to measure knowledge after using World Phenomena Game and 3 ) to study user satisfaction after playing World Phenomena Game. In this study an offline ADVENTURE RPG personal computer game was created and validated by 3 professionals with medium level. Then the game was put to test with a sample group of 10 Satrivoranart Bangkhen School’s Grade 3 students. Quiz and questionnaires were distributed to collect student’s knowledge and satisfaction. During data analysis a attest was performed with t-Test = 1.83 p=0.05. indicated that student knowledge after playing game was statistical higher than their knowledge before playing game Furthermore overall user satisfaction was at high level (𝒙̅=4.30 : SD=0.90).