The figure in the image is the Transformers Generations Titan Class Metroplex, released in 2013 as part of the "Thrilling 30" line, and it holds the distinction of being the very first Titan Class figure ever produced.
The character Metroplex first appeared in the third season of the original G1 cartoon series and quickly became an iconic figure. He is a massive Autobot city-bot, a last remaining Titan who can transform into a full-fledged Autobot city or battle station. A key line associated with him in the lore is "Metroplex heeds the call of the last Prime". The 2013 toy's design is based on his appearance in the Fall of Cybertron video game.
Never use/play before. In box since purchased.