Here is the full list of all 29 Rift Sweepers achievements.
Charge Gas with 1 sec left in Corrupted Subway
Kill at least 3 Conopeum with the Fragmentation Grenade
Reach Sweeper level 50
Kill at least 4 Elite demons while Smoking
Kill at least 2 demons by using Ambra
Kill at least 15 demons with John's Blaster
Rescue other players 25 times
Reach Sweeper level 40
Kill your teammates by dropping a pizza box on them
Kill at least 3 demons with John's Mine
Kill at least 10 demons with Simon's Sticky Bomb
Win with other players 25 times
Destroy a Coriarius Missile by shooting it
Reach Sweeper level 30
Destroy a Buccus Fireball by shooting it
Attacked by Fraxinus 25 times
Kill at least 3 Elite demons while on Sharp Vision
Kill at least 2 demons by dropping a pizza box on them
Carry all tanks of gasoline alone
Clear Sewer Buster
Reach Sweeper level 20
Lose a mission
Clear Corrupted Subway
Reach Sweeper level 10
Destroy Stipula Spit by shooting it
Clear Restaurant from nowhere
Purchase at least one license
Clear any map without dying
Complete a mission