The "Mega Manniversary" sale hacks 50 percent off the price of six Mega Man games until Monday, December 22 at 11:59 a.m. ET (8:59 a.m. PT). On sale are the Game Boy versions of Mega Man 2, Mega Man 3 and Mega Man 4 for 3DS, each down to $1.49. As for Wii U, players can download NES games Mega Man 5 and Mega Man 6 for $2.49 each as well as Mega Man 7 for $3.99. Of course, kids these days may have troubles with these difficult retro platformers.