Here is the full list of all 44 Destroy All Humans! 2 - there are Reprobed achievements.
Find the hidden basketball on the moon and score a hoop with PK Slam
Demolish a public toilet on each map
Collect all Alien Artifacts
Collect all songs
Collect all posters
Use your saucer's weapons to scare human cattle out of their hidden hives on each map
Complete all odd jobs
Complete all optional mission objectives (use the Holopoxdeck if you have to)
Destroy the crab behind the curtain
S.K.A.T.E. from the Blisk dome to the base's entrance without interruption
Unlock all Gene Blender upgrades
Invade Solaris
Kill a reincarnated guru with his own body
Destroy a washed-up scammer in Takoshima
Destroy an old foe in Tunguskan ship-to-ship battle
Destroy a crusty old cryptid in Tunguska
Re-visit a mission in the Holopoxdeck at a saucer landing zone
S.K.A.T.E. from the landing zone near Tarkovskoye along the tracks to the East without interruption
Invade Tunguska
Destroy a familiar-looking monster in Takoshima
Summon Arkvoodle and take hold of his vibrating super-weapon
Outrun Blisk Spores with S.K.A.T.E.
S.K.A.T.E. from the temple gates through the park to Takoshima City without interruption
Ascend Takoshima Tower
Invade Takoshima
Destroy a majestic presence in Albion
S.K.A.T.E. from Parliament to the Russian embassy without interruption
Drop a human from the top of Albion Bridge by cancelling PK
S.K.A.T.E. up the road to Coit Tower without interruption
Throw a cop through a donut with PK
Upgrade your saucer in the Pox Mart at a saucer landing zone
Destroy a dastardly double agent in Albion
Score three perfectly-timed Anal Probes in a row
Invade Albion
Phone home
Complete your first steps on the Path of the Sacred Crotch
Use a Furotech Reactor to purchase a capstone upgrade in the Pox Mart
Destroy a tool in Bay City
Upgrade Crypto in the Pox Mart at a saucer landing zone
Line up three humans with the Dislocator and send them sprawling
Accelerate Brain Extract, Body Snatch, Transmog or Drain by mashing that button like you mean it
Rifle through your Furonigami collection
Try out a new look for Crypto in the Cloning Chamber
Invade Bay City