Here is the full list of all 30 Teenage Mutant Ninja Turtles: Out of the Shadows achievements.
Complete Chapter 1.
KO 100 enemies with Leo.
Max out Leo's special weapon rank.
Shoulder run off 100 enemies with Leo.
KO 100 enemies with Don.
Max out Don's special weapon rank.
Hit 25 enemies with Don's special pose attack.
KO 100 enemies with Mikey.
Max out Mikey's special weapon rank.
Special taunt 100 times with Mikey.
KO 100 enemies with Raph.
Max out Raph's special weapon rank.
Tapout 25 enemies with Raph.
KO 25 enemies with a Special Attack.
Perform a double counter 25 times.
Perform a special counter 25 times.
Perform a team attack 50 times.
Perform a TPKO on 100 enemies.
Perform a Shell Shock 100 times.
Perform a stealth KO 25 times.
Perform a 4 turtle TPKO.
Perform a 99-hit combo.
Perform 12 attack variations in one combo.
Complete all challenges.
Complete round 20 in Survival Mode.
Complete the Arcade Mode.
Complete Chapter 2.
Complete Chapter 3.
Complete Chapter 4.
Unlock Classic Mode.