With a Marvel Crossover, an anime series, various merchandise, OVA DVDs and Blu-ray discs, a live action movie, costumes, advertising deals, video games etc., "Attack on Titan" is everywhere.

But, as with any popular franchise, it will sell as long as it remains popular.

Luckily, "MapleStory" is free. Well sorta. According to reports from Crunchyroll and Kotaku, the online MMORPG "MapleStory" now gives players the option to participate in an "Attack on Titan" themed event where they become Cadet Corps members. The only catch appears to be that the players must be at Level 30 or higher.

Even fans of the popular series have begun to notice just how much "Attack on Titan" themed objects have appeared.

"They're just putting ‘Attack on Titan wherever they can aren't they?" commented Vickesam on CR.

"Attack on toiletpaper, attack on weightloss, Attack on condoms, attack on body spray, and coming to a store near you attack on diapers!" exaggerated Frostblitz20.

According to Crunchyroll, players will get to interact with familiar characters Eren, Mikasa, and Armin. The main goal of the event is to climb to the top of Wall Rose and face off against the Colossal Titan while collecting items along the way. Additionally, players can use coins to purchase hats inspired by the image of Eren, Mikasa, Armin and even Captain Levi.

Also, 3D Maneuver gear will be available for players to use.

For those who are unfamiliar with the game, "MapleStory" is a side-scrolling MMORPG where "epic adventure, action and good friends await you. With hundreds of hours of gameplay, this immersive role-playing experience will allow you to unleash your wild side as you create and train a mighty hero, conquer perilous dungeons, overcome terrifying bosses, socialize with your friends and much more. Your ‘MapleStory' begins today!"

"Attack on Titan" is an original manga series by Hajime Isayama that is still ongoing.