Here is the full list of all 23 The Walking Dead: The Telltale Definitive Series achievements.
Completed Season 1 Episode 1
Completed Season 1 Episode 2
Completed Season 1 Episode 3
Completed Season 1 Episode 4
Completed Season 1 Episode 5
Completed Season 1 Episode 6
Completed Season 2 Episode 1
Completed Season 2 Episode 2
Completed Season 2 Episode 3
Completed Season 2 Episode 4
Completed Season 2 Episode 5
Completed Season 3 Episode 1
Completed Season 3 Episode 2
Completed Season 3 Episode 3
Completed Season 3 Episode 4
Completed Season 3 Episode 5
Completed Michonne Episode 1
Completed Michonne Episode 2
Completed Michonne Episode 3
Completed Season 4 Episode 1
Completed Season 4 Episode 2
Completed Season 4 Episode 3
Completed Season 4 Episode 4