Full list of all 18 Toy Soldiers achievements worth 300 gamerscore. It takes around 8-10 hours to unlock all of the achievements in the base game on Xbox 360.
The base game contains 12 achievements worth 200 Gamerscore, and there are 2 DLC packs containing 6 achievements worth 100 Gamerscore.
Survived until Round 5
Defeated Zeppelin
Defeated Uber Tank
Completed the Campaign
Completed a level in Elite mode
Defeated Tsar Tank
Guided a shell to its destination
Earned General Rank on a level
Completed level 1
Win a Multiplayer Match on every level
Earn General Rank on all Campaign levels
Complete Campaign+ and earn all Ration Tickets
Find all of the golden cubes in The Kaiser's Battle
Defeat the K-Wagen
Get a 40x blast combo
Find all of the golden rockets in Invasion
Defeat RoboBob
Shoot down 40 UFOs with your P-51 Mustang