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