Here is the full list of all 16 REDDOOR achievements.
REACH ROUND 10 IN SURVIVOR GAMEMODE
REACH ROUND 20 IN SURVIVOR GAMEMODE
REACH ROUND 30 IN SURVIVOR GAMEMODE
UPGRADE ANY GUN TO LEVEL 1
REACH LEVEL 100 RANK
GET 100,000 SCORE IN A SINGLE GAME
HAVE 6 PERKS AT THE SAME TIME
KILL 500 ZOMBIES IN A SINGLE GAME
KILL 250 ZOMBIES WITH A HEADSHOT IN A SINGLE GAME
REACH ROUND 10 IN ENIGMA
REACH ROUND 10 IN DEMO
REACH ROUND 10 IN REDFALL RETREAT
REACH ROUND 10 IN REDFALL
REACH LEVEL 200 RANK
HAVE 9 PERKS AT THE SAME TIME
REACH ROUND 10 IN STALK