You cannot play the Transformers: Prime game online as it was released only for Nintendo Wii, Nintendo DS, Nintendo 3DS and Nintendo Wii U. Other Transformers games can be found online at Hasbro's official website.
Hasbro's Transformers page contains a list of child-friendly games geared toward Transformers fans. Games include a Comic Creator, Dinobot Hunt and KRE-O Prime Defense. All games are free and playable in the web browser.
The Transformers: Prime game can be purchased for Nintendo systems. The game is full of action that puts the player among familiar heroes and against the franchise's main villain, Megatron. Review websites such as IGN and Metacritic gave the game average scores.