Destroy All Humans

Invade Turnipseed Farm

Invade Rockwell

Invade Santa Modesta

Invade Area 42

Upgrade Crypto at Pox's Lab in the mothership

Upgrade your saucer at Pox's Lab in the mothership

Revisit a missionless invasion site and complete a challenge there

Try out a new look for Crypto in the mothership's archives

Accelerate Brain Extract or Transmog by mashing that button like you mean it

Destroy a human with a weapon and another with a psi ability at the same time

Stay covert by scanning primitive human thoughts

Recover a Furon Probe

Throw something into something else with the saucer's Abducto Beam

Explore the more offbeat parts of the mothership

Transmogrify an object to replenish your ammunition

Consume a human brain to kickstart your shield regeneration

Use your saucer's Repulse-O-Tron to fend off homing missiles

Use PK to destroy a human with another human

Destroy multiple humans with a human-made explosive

Display Furonic aeronautic prowess by soaring through giant human pastry without soiling your feet

Demonstrate Furon free spirit near a warning sign placed by the human authorities

Abduct a cow with your saucer

Set something on fire, then use it to destroy a hapless human

Throw a human into the air and juggle them

Ace an Abduction challenge with a three-star rating

Ace a Race challenge with a three-star rating

Ace a Rampage challenge with a three-star rating

Ace an Armageddon challenge with a three-star rating

Obtain at least a two-star rating for each challenge type

Fully upgrade one of the branches of a weapon or ability