What are some classic arcade games that can now be played online?

ClassicGamesArcade.com offers a number of classic arcade games to play for free online, including "Pac-Man," "Street Fighter 2" and "Mortal Kombat." FreeWebArcade.com offers "Donkey Kong," "Space Invaders" and "Battle City."

"Pac-Man" is a quintessential arcade game in which players control a character that must eat pellets and avoid ghosts through a maze. "Street Fighter" and "Mortal Kombat" are two classic fighting games, with "Mortal Kombat" being the more extreme of the two. "Donkey Kong" provided the first ever appearance of Mario, while "Space Invaders" tasks players with blasting an oncoming alien army. In "Battle City," players must navigate a war zone and destroy all enemy tanks.