Here is the full list of all 27 How To Survive: Third Person Standalone achievements.
Get zombies deer to kill 20 Zombies.
Complete the 12 secondary quests of Kovac's monkeys.
Kill 20 zombies in less than 5 seconds.
Complete the story mode in "Normal" difficulty.
Kill 2000 zombies
Kill 10 zombies in less than 5 seconds.
Kill 5 monsters in a row with a bullet or an arrow.
Enter Santa Barbara Island
Kill 1000 zombies
Enter La Sonada Island
Enter La Vendida Island
Perform 100 instant kills.
Kill 5 zombies in less than 5 seconds.
Unlock your first skill
Perform 5 instant kills in less than 15 seconds.
Achieve your first instant kill on a zombie.
Find the 20 special plants of the Herbarium.
Complete a challenge with a "S" ranking.
Reach "Survival hobbyist" ranking tag (Challenge mode)
Complete the story mode in "Iron man" difficulty.
Complete a challenge in "Normal" difficulty without using medicinal plants nor medikits.
Complete a challenge in "Iron man" difficulty without using medicinal plants nor medikits.
Complete a challenge in "Normal" difficulty without losing health.
Complete a challenge in "Iron man" difficulty without losing health.
Complete the mode "One Shot Escape" in "Easy" difficulty.
Complete the mode "One Shot Escape" in "Normal" difficulty.
Complete the mode "One Shot Escape" in "Iron Man" difficulty.