Here is my save from a fully 1k'd The Walking Dead: Survival Instinct
IMPORTANT!!!
you have to of finished the game at least once yourself as this save will unlock stat based achievements like fire 300 bullets and execute zombies by doing 1 more of all those stat based achievements
also if you start a new game and finish it you will unlock the following
Every Man, Woman and Child
Choose to Travel at Least Once with Every Optional Survivor
No Down Payments
Find Every Useable Vehicle
Been Everywhere
Complete All Marked Destinations on the Map
and many many more from doing just one more thing
one last thing i don't think you will be able to get the collectiables achievement from this as i found them all and you can't repick them up so just use this save to mop up any achievements your missing