Here is the full list of all 86 Survivor Squad: Gauntlets achievements.
Kill 500 Infected
Read the bloody love letter, Gauntlet: Brock and Dave
Complete a Gauntlet Achievement
Finish a Gauntlet
Kill 200 Infected
Get 100 kills with a Gordon
Kill 50 Infected
Build a Gauntlet with 2 Sentry Guns
Kill 1000 Infected
Play 5 Gauntlets
Play 10 Gauntlets
Play 20 Gauntlets
Get 10 Bronze Stars of better
Get 5 Gold Stars or better
Get a Platinum Star
Publish a Gauntlet
Get 5 Speedy Achievements
Get 5 Untouchable Achievements
Beat a Gauntlet with 0 damage taken
Beat a Gauntlet in under 60 seconds
Reach Level 5
Reach Level 10
Reach Level 20
Reach Level 50
Publish a Gauntlet containing 10 Events
Visit Endless Loop Studios Facebook
Visit Endless Loop Studios Twitter
Post your score on Twitter
Post your score on Facebook
Place 50 Events
Place 20 LEDs
Beat 5 Challenges
Beat 10 Challenges
Beat 20 Challenges
Get a Platinum star on your first try
Open the drawer, Gauntlet: Tutorial
Light up the LED, Gauntlet: Tutorial
Activate the Electric Door, Gauntlet: Tutorial
Turn on the Machine, Gauntlet: Grabber Machine
Get trapped, Gauntlet: Trailer Gauntlet
Equip all Survivors with Eveys, Gauntlet: Trailer Gauntlet
Get the code right on the first try, Gauntlet: Darkness
Read all the research logs, Gauntlet: Darkness
Get past the lasers without taking damage, Gauntlet: Darkness
Equip all Armory weapons within 45 seconds of opening it, Gauntlet: Snow Outpost
Take no damage before opening the Armory, Gauntlet: Snow Outpost
Follow the lights in less than 2 minutes, Gauntlet: Snow Outpost
Get 150 kills with a Creedy
Get 200 kills with a Vendetta
Get 200 kills with a Sutler
Get 500 kills with a Finch
Get 1000 kills with a Evey
Clear 10 Daily Challenges
DONT DEAD OPEN INSIDE, Gauntlet: The Great Escape
Find the super-secret-not-so-secret area, Gauntlet: The Great Escape
Get past the laser gates in 30 seconds, Gauntlet: The Great Escape
Found the Secret Room, Gauntlet: The Great Escape Lite
Open the Gate on the first try, Gauntlet: The Great Escape Lite
Take no damage while running towards the Sentry Guns, Gauntlet: The Great Escape Lite
Participated in the Early Access. Also unlocks if you have all other achievements so you can get 100%
Find the neighbours Dascomb, Gauntlet: Mike and Kenny
Find the hidden Eveys, Gauntlet: Brock and Dave
Open the cells, Gauntlet: Brock and Dave
Defuse the bomb, Gauntlet: Material Gathering
Navigate the lasers without being hit, Gauntlet: Material Gathering
Use the Sonar 10 times, Gauntlet: Material Gathering
Survive the first Poison Fog without taking damage, Gauntlet: Base Building
Deploy all Gadgets, Gauntlet: Base Building
Break 2 Cement Bags into Bricks within 2 seconds, Gauntlet: Base Building
Find the Red Key, Gauntlet: Routine Scavenging
Survive until the last day, Gauntlet: Routine Scavenging
Train a Survivor to the max, Gauntlet: Routine Scavenging
Beat Editor Challenge 7
Beat Editor Challenge 20
Get over 10 score, Gauntlet: Flappy Survivor
Found the Mysterious Vial, Gauntlet: Desert Survival
Kill 500 Infected, Gauntlet: Weapon Achievement Gauntlet
Call in 5 Air Strikes, Gauntlet: Survivors Vs Zombies
REALLY?! We just arrived here!, Gauntlet: Safe Haven
Dude can you wake u-- Never mind. Stay dead!, Gauntlet: Safe Haven
Wait! You found the Red Key?! Better collect your prize..., Gauntlet: Safe Haven
Deploy 2 Sentry Guns, Gauntlet: The Complex
Get everything on max level, Gauntlet: The Arena
Craft 6 weapons, Gauntlet: The Arena
Deal more than 150 damage to Survivors in the first 90 seconds, Gauntlet: Infected Mastermind
Loot every container, Gauntlet: Daily Scavengers