And you can only choose ONE!
For me it would have to be the Star Wars game with wireframe graphics where you had to fight Tie Fighters and blow up the Death Star. The sound and music were amazing at the time and the gameplay was great.
I ALMOST opted for Track & Field, Double Dragon, Defender and Scramble but Star Wars JUST edged it!
The BEST thing I've ever enjoyed in an arcade wasn't a game but a Dalek you could sit in where you could move the gun and plunger and get it to scream EXTERMINATE!!! That was so awesome to play with when I was a kid. They had one at the Broadstairs arcade in the 70s.
"This you have to understand. There's only one way to hurt a man who's lost everything. Give him back something broken."
Thomas Covenant, Unbeliever