Here is the full list of all 12 Chase Survivors achievements.
Reach level 5 with any character.
Reach level 10 with any character.
Survive 1 minute.
Survive 5 minutes with Exterminator.
Destroy 25 crates.
Upgrade the Chainsaw to level 4.
Upgrade the Grenade Launcher to level 4.
Upgrade Rocket Launcher to level 7.
Upgrade Ricochet to level 7.
Equip your character with 6 weapons.
Find a magnet.
Survive until the end.