Here is the full list of all 11 RUSLICSTAN INVADES achievements.
Mass production of good ruslics has began
Completed the game
Most wanted item on the whole swampland
You have seen things...
Toilet horde defeated
Like the song? Check out the Surface Tension band
Completed the game on Hard difficulty
Completed the game on Very Hard difficulty
Completed the game on Horde difficulty
Completed the game on Fat difficulty
Completed the game on Fast difficulty