The second act of the epic Sonic the Hedgehog and Mega Man crossover event BEGINS HERE! "When Worlds Collide," Part Five of Twelve. Sonic, Mega Man, Tails and Proto Man enter the strange world of the Skull Egg Zone. They don’t receive a warm welcome, either, as the Genesis Unit and Copy Robot attack! Drs. Eggman and Wily wait in the wings with an even more sinister surprise waiting to be unleashed! You cannot miss this action-packed issue, featuring new cover art by Patrick “SPAZ” Spaziante!

The sequel to the record-shattering Sonic the Hedgehog and Mega Man crossover is here! You saw what happened when "Worlds Collide!" Now brace yourself for when WORLDS UNITE! Dark forces have come together in the far future! The vicious conqueror Sigma has cheated death again and escaped the justice of X and the Maverick Hunters. He's crossed space and time to join forces with Zavok and the malicious Deadly Six of Lost Hex! Sonic and Mega Man could save us--but they've gone missing! Now the Freedom Fighters of Sonic's world and the Robot Masters of Mega Man's world must take up the fight to save their heroes and stop the coming tide of darkness! WORLDS UNITE features guest appearances by the cast of SONIC BOOM, MEGA MAN X and some of CAPCOM and SEGA's biggest stars! This volume collects WORLDS UNITE parts 1-4, including SONIC UNIVERSE #76, SONIC BOOM #8, SONIC THE HEDGEHOG #273, MEGA MAN #50 (includes 10 extra pages of story!) and selections from the MEGA MAN: WORLDS UNITE BATTLES one-shot, and also includes bonus materials such as creator spotlights, production art, and 21 pages of cover images. From the Trade Paperback edition.

The crossover event of 2013 continues here! There are strange things afoot as Mega Man's world is menaced by a super-fast, blue attacker. Sonic's world is being stalked by a blue-armored figure with a cannon for an arm. Could these mysterious villains be Sonic and Mega Man? Or are they some kind of sinister copies? Mistaken identities and explosions galore in this explosive second part to the historic Sonic the Hedgehog and Mega Man crossover! Continues in this month's Sonic the Hedgehog #248!"

The ALL-NEW Sonic/Mega Man Crossover sequel comes to a chaotic close with “Worlds Unite” Part Twelve: The grand finale to “Worlds Unite” sees our super-powered heroes Sonic and Mega Man face off against the evil Sigma in his final, most lethal form! If that wasn’t enough, the Genesis Portal-ravaged reality is falling apart and time is running out to fix it! You don’t want to miss the stunning conclusion to the biggest crossover event of the year! Featuring the worlds of STREET FIGHTER, SKIES OF ARCADIA, NiGHTS INTO DREAMS, OKAMI, GHOSTS ‘N’ GOBLINS, ALEX KIDD and more! Featuring cover art from the legendary T.Rex!

Get your first look at the crossover event of 2013 here! Before worlds collide in Mega Man #24, check out this digital-exclusive FREE preview! Get a recap of the events leading up to the crossover, see some amazing upcoming covers by Patrick "SPAZ" Spaziante, and get an exclusive first-look at some of the interior artwork from Mega Man #24! Get ready, folks-it's Blue times TWO!

The mastermind behind the Metal Virus isn't done yet. Sonic writer extraordinaire Ian Flynn brings you the latest elaborate scheme from the Blue Blur's newest nemesis! Dr. Starline is back to his evil antics! But to enact his latest scheme, he'll have to get into an abandoned Eggman base, past an army of badniks! And to do that, he'll need the help of some of Sonic's greatest enemies! Zavok, Mimic, Rough, and Tumble are back and badder than ever! Starline's promised them incredible power, so Sonic and friends had better watch out. That is, if the not-so-good doctor can get these Bad Guys to stop fighting each other and work together.

ENTER THE FINAL FIGHT FOR THE FUTURE! “The Silver Age” part four: The finale to Silver’s latest adventure! Silver simply doesn’t have the might to stop the creature menacing his time. Maybe the combined brain power of Gold and Prof. von Schlemmer can help! It’s a knock-down, drag-out fight for the fate of the future with a shocking ending you’ll never see coming-even if you’re psychic! Featuring cover art by the “Silver Age” writer herself, Evan Stanley, plus a special “Movie Poster Variant” by the terrific T. Rex!

"A Sudden Shift." The world has fallen to the Metal Virus. Heroes, villains, and civilians have become Zombots. There's only one place left to hide and the few survivors--good and bad alike--find themselves up against a new threat commanding the Zombot hordes. Who will Sonic turn to for help in his most desperate hour? Find out in this extra-length issue!

"Dr. Eggman and Dr. Wily are evil geniuses who want to conquer their worlds, but have been foiled every time by their blue nemeses! When the power of a Chaos Emerald allows the two to meet, it's game on! It's cross-world chaos as heroes are pit against each other! The Blue Blur and Blue Bomber battle from one world to the other with Eggman and Wily laughing behind the scenes. Who comes out on top? Can the heroes come to an understanding and save the world?"--Page 4 of cover.

Compilation of the first Sonic the Hedgehog comic book mini-series, Sonic #0-#3.