8 Video Game Easter Eggs That Will Make You Sweat
3. Hadouken! - Mega Man X
Man, Mega Man X is awesome: it has some great boss battles, great gameplay, great music, great weapons, and most importantly... great Easter eggs. Don’t believe the critics, kids: it's the Easter eggs that make or break a game, not anything as obvious and vulgar as gameplay.
After completing a series of challenging tasks (including beating a stage without taking any damage, and collecting every upgrade) you can find Doctor Light (dressed as Street Fighters’ Ryu no less) ready to grant you the Hadouken.
And in a neat touch, you can activate the weapon by issuing the same button command required to use the Hadouken in Street Fighter. Well played indeed.