Here is the full list of all 14 Techno Tower Defense achievements.
Get the Champions Medal in level 3
Get the Champions Medal in level 2
Receive a Game Over by depleting the players health
Kill 10000 enemies
Buy all upgrades in one session
Get a lifetime score of 1 million
Get the Champions Medal in level 1
Get a lifetime score of 100000
Kill 1000 enemies
Kill 100000 enemies
Kill 1000000 enemies
Get a lifetime score of 10 million
Get a lifetime score of 100 million
Get the Champions Medal in level 4