Quote (sylvannos @ Mar 12 2014 07:09pm)
A lot of things, actually. Kirkman has said in interviews there's changes he's made from the comics to 1) make it so people who have read the comics have something to watch and not have everything spoiled; and 2) changes he'd make if he could go back in time and fix (specifically the Governor's character, adding Darryl, etc.).
Main differences:
* Darryl and Merl don't exist in the comic.
* Andrea and Sophia, along with Carl, Rick, and Glenn, are the longest living survivors from the Atlanta group.
* Andrea is the group's sniper and one of its leaders. When the council is formed to relieve the burden on Rick, Andrea is on it along with Dale, Glenn, Michonne, and Hershel.
* Andrea and her sister originally meet Dale because he has an RV and sleep with him. After her sister dies in the attack outside of Atlanta, she forms a deeper relationship with Dale.
* The group doesn't go into Atlanta to find the CDC. They go from their camp to Hershel's farm to the prison.
* The season two finale where Carl shoots Shane happens before the group leaves Atlanta. Shane pulls a gun on Rick, and Carl shoots him. They bury Shane's body nearby. At the prison, they realize the dead come back no matter what. Rick digs Shane's body up to confirm this, then leaves him as a walker instead of in his grave as punishment for betraying him.
* Abraham's group meets with Rick's group at the farm, not after the attack on the prison.
* Carrol commits suicide after her husband dies and a murderer/pedophile slits her daughters' throats (the two girls in the show who she adopts are actually hers in the comics). This happens before the group meets the Governor.
* Rick, Glenn, and Michonne are the ones who go look for the downed helicopter, not Andrea, Maggie, and Glenn. Since they're wearing prison jumpsuits and have riot gear, the Governor knows there from a nearby prison he's been searching for. He cuts off ricks left hand. When the group doesn't talk, he ties up Michone, rapes and tortures her, while forcing Glenn to listen and watch.
* Michonne and Tyrell go on a revenge attack after escaping Woodbury (Rick already escaped). This happens when the Governor's men follows her and Glenn to the prison, where the first skirmish happens. She finds the Governor, cuts his eye out, chops off his dick and hand, and it's implied sodomizes him.
* Hershel dies in the first skirmish.
* Several weeks later, the Governor shows up with all of his forces after being nursed back to health from Michonne's torture, including the tank (but they don't have ammo for its cannon).
* A sniper hits Lori while she's carrying Judith. Lori dies and collapses on Judith, crushing the baby. The sniper, not realizing until it was too late that she shot a woman and her child, kills the Governor in a rage and leads the remaining Woodbury troops into the prison as it's overrun by walkers. This lets Rick's group escape.
* Dale dies when he's captured by a group of cannibals. He, not Hershel, had his leg amputated when bit at the prison.
* Andrea and Rick start sleeping together after Dale and Lori die.
* All of Maggie's family, including Beth, are killed by the time the group leaves the prison. She and Glenn adopt Sophia, who is still alive. Sophia is the last of her family after her father is killed outside of Atlanta, Carol commits suicide, and her sisters are murdered at the prison.
Couple issues with your synopsis breakdown here:
1) After Rick digs Shane up after realizing those who die will come back as walkers, he shoots him in the head - didn't want his best friend to be trapped as a walker inside the grave. Here is the reference:
http://walkingdead.wikia.com/wiki/Shane_(Comic_Series)2) Abraham's group in the comics met up with Rick's group AT HERSHEL'S FARM - AFTER THE PRISON BATTLE with governor's group. They lost the prison stronghold since it was destroyed, the safest spot for them was to go BACK TO HERSHEL'S farm. The show is similar in this aspect since in the show Glenn meets up with Abraham's group AFTER the prison battle with the governor.
3) Lori didn't died to shotgun blast through her back.
4) Dale died due to 2nd bite on his shoulder during their trip to Washington DC with Abraham's group. His first bite was on his leg and they amputed it. The 2nd time he got bit it was on his shoulder and he hid it from the group - he wandered to the forest to die in peace but the Hunters captured him and ate his other good leg. They wanted to eat him piece by piece, but Dale was laughing in irony that they all ate tainted/infected meat as he was bitten in the shoulder and was on his way to die alone in the forest.