Portal Journey: Portarius is a 2D puzzle game set in a sci-fi future. You play as the titular pilot Portarius, who must navigate their way to the center of the Earth and solve the mystery of its rapid decay. Helping you on your journey to the center is a powerful portal gun gifted to you by your father. The game's mechanics revolve around said portal gun (not to be confused with the game Portal), which can transport items, materials, and even your own ship around the different levels. Use it wisely to solve the game's variety of unique puzzles. Portal Journey has three chapters in total.