Here is the full list of all 70 Project RIP achievements.
4000 Arena Kills
Find 240 Demon Shards
2000 Mission Headshots
Find 80 HQ Transmitters
1500 Arena Headshots
1000 Arena Headshots
2000 Arena Kills
500 Arena Headshots
1300 Mission Headshots
500 Explosive Arena Kills
300 Explosive Arena Kills
Complete Catacombs on RIP
6000 Mission Kills
Find 120 Demon Shards
1000 Explosive Mission Kills
Find 40 HQ Transmitters
600 Explosive Mission Kills
400 Melee Arena Kills
800 Mission Headshots
600 Melee Mission Kills
200 Arena Headshots
300 Explosive Mission Kills
Find 20 HQ Transmitters
3500 Mission Kills
150 Explosive Mission Kills
Find 60 Demon Shards
100 Explosive Arena Kills
200 Explosive Arena Kills
1000 Arena Kills
200 Melee Arena Kills
300 Melee Mission Kills
150 Melee Mission Kills
Find 10 HQ Transmitters
Kill 120 Wraiths
40 Melee Mission Kills
80 Melee Mission Kills
100 Melee Arena Kills
20 Melee Arena Kills
60 Melee Arena Kills
300 Arena Kills
50 Arena Headshots
Complete Caves on RIP
80 Explosive Mission Kills
2000 Mission Kills
40 Explosive Arena Kills
Complete Caves on Insane
Complete Caves on Hard
100 Arena Kills
Complete Caves on Normal
Find 30 Demon Shards
Complete Catacombs on Insane
Kill 60 Wraiths
Complete Catacombs on Hard
300 Mission Headshots
Find 5 HQ Transmitters
Complete Catacombs on Normal
1000 Mission Kills
Kill 40 Wraiths
Complete Graveyards on RIP
Find 15 Demon Shards
Kill 20 Wraiths
Complete Graveyards on Insane
Complete Caves on Easy
Complete Catacombs on Easy
Complete Graveyards on Hard
300 Mission Kills
100 Mission Headshots
Kill 10 Wraiths
Complete Graveyards on Normal
Complete Graveyards on Easy