~Mega Man 2~(Rockman 2 Dr. Wily no Nazo) the first "Boss Design Contest" and "E-can"

• Released in 1988 for the Famicom, this sequel refined the original's mechanics and established the core standards for the entire Rockman series.

• Following his defeat, the evil Dr. Wily returns with eight powerful new combat robots to challenge Rockman and resume his quest for world domination.

• Alongside returning heroes, eight unique bosses appear; their designs were famously selected from fan submissions in the first "Boss Design Contest".

• Key additions include the Energy Tank (E-Can) for health, a grid-based password system, and three support items that serve as prototypes for Rush.

• The game is celebrated for its "exquisite balance," allowing high-skill players to win with the Buster while rewarding the tactical use of special weapons.

• Special weapon utility is uneven; the Metal Blade is exceptionally versatile, while the Time Stopper and Atomic Fire suffer from poor energy efficiency.

• The Boobeam Trap requires specific weapon energy, leading to tedious grinding if lost. Additionally, all stored E-Cans are lost upon a Game Over.

• The overseas version added a "Normal" mode where players deal double damage, alongside a "Difficult" mode matching the original Japanese challenge.

• Developed in just three months, its iconic soundtrack later spawned major viral internet songs like "Omoide wa Okkusenman" and "Airman ga Taosenai".

• Often hailed as a "series masterpiece," it perfected the formula and set the template for sequels with its polished gameplay and boss rush format.