Here is the full list of all 41 Outcast - there are Second Contact achievements.
Finish main mission
Finish all sub-missions
Defeat at least 20 soldiers in Motazaar for Ashkar.
Defeat 10 soldiers using dynamite.
Obtain the Mon in Okaar.
Complete the organ puzzle in Okaar.
Find the Achondar.
Destroy the four boats in Shamazaar to weaken the soldiers!
Kill all the gamors in the Okaar arena.
Reach the region of Okaar.
Set Shamaz Keb free.
Defeat 250 soldiers.
Help Zernar fix the boat light by providing a piece of helidium from Motazzar.
Help Heza repair his well.
Damage the rift bridge to slow the soldiers down.
Reach the region of Motazaar.
Travel 10 times through Daokas.
Obtain the Mon in Okasankaar.
Destroy the company of soldiers located in Zorkatraz.
Unlock the wheel to enter the Darosham!
Help Sadar fix his boat using a Zeedog plant.
Talk to 25 important Talans.
Defeat 150 soldiers.
Kill the beast in the water behind the temple of Ka.
Achieve the highest level of reputation by helping the Talans.
Defeat more soldiers to convince Zot to stop paying taxes.
Find the Mon in Shamazaar.
Use dynamite on a chest.
A worker at one of the temples wants the Yods to clear away the debris.
Kill 25 Krakits.
Fill your backpack with over 250 rounds for your UZA-SH1.
Deliver a Twon-ha for Zolass.
Find a Shamaz and convince him to heal Ilott.
Defeat at least 20 soldiers for Maar.
Kill the gamors far to the east of the village.
Find Shamaz Zeb and speak to him.
Reach the region of Okasankaar.
Reach the region of Talanzaar.
Obtain over 300 rounds for your HK-P12.
Complete all four tests with Jan.
Complete the stealth tutorial in Ranzaar with Jan.