Like every arcade game as a kid: Defender, Xevious, Galaga, Berzerk, Battle Zone, Asteroids, the Dark Knight pinball machine. My 10 year old self had no idea these games were supposed to be infinite/unbeatable. Or rather, I always assumed they were. I had no clue they could crash if you were super expert at them. I think Xevious actually had an end tho.
As for arcade games a casual could finish but I gave up on? A decade later, Virtua Fighter.