Here is the full list of all 20 Haunt Chaser achievements.
Complete 20 Objectives
Hit The Trap 10 Times
Get Sent To Purgotary 10 Times
Revived By Friend 3 Times
Use Speed 20 Times
Use Seal 10 Times
Hear 15 Sounds
Complete 45 Objectives
Complete 80 Objectives
Take 50 Photographs
Banish Entity 5 Times
Find Treasure 3 Times
Place Ward 15 Times
Trap Entity 6 Times
Teleport 20 Times
Revive Chaser 10 Times
Send 60 Chasers To Purgatory
Send 40 Chasers To Purgatory
Send 20 Chasers To Purgatory
Win 20 Games