Copypasta goes as followed:
An entire re-imagining of the Saiyan to Cell arcs based on the prospect of "What if Piccolo didn't miss"... the first time he used Special Beam Canon on Raditz.
-Goku doesn't die and go to train with King Kai at this point.
-Gohan doesn't get trained by Piccolo and instead trains with Goku and the other Z warriors at Kami's.
-Nappa and Vegeta still come to avenge Raditz.
-Chaozu manages to Kamikaze Nappa, after he kills Piccolo in an actual fight.
-Vegeta kills Goku and then Gohan.
-Tien with Yamcha's and Yajirobe's help manages to defeat Vegeta, thought they are still only able to drive him off the planet.
-Gohan, Chaozu, Goku, and Piccolo then go to train with king Kai.
-Yamcha, Tien, Krillin and Bulma leave to Namek. Once there they collect the Dragon Balls and ally themselves with Vegeta. They manage to beat the Ginyu Force and recover the final dragon balls from them.