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