Here is the full list of all 17 Road Defense: Outsiders achievements.
Defeat a total of 100 enemies.
Reach Level 5.
Defeat a total of 10 enemies.
Protect the village 01
Protect the village 02
Protect the village 03
Protect the village 04
Defeat a total of 1.000 enemies.
Defeat a total of 10.000 enemies.
Defeat a total of 20.000 enemies.
Reach Level 10.
Reach Level 15.
Buy the Fusion Bomb.
Buy the laser beam.
Protect the village 00
Protect the village 05
Protect the village 06