Here is the full list of all 25 Vicious Circle achievements.
Win 100 rounds.
Participate in 250 events.
Participate in 100 events.
Win 25 rounds.
Participate in 50 events
Play 100 Rounds.
Collect 5000 Nuggets.
Win 10 rounds.
Play 50 Rounds.
Collect 2500 Nuggets.
Participate in 25 events.
Get a kill on the Monster.
Play 25 Rounds.
Collect 1000 Nuggets.
Win a round.
Collect 500 Nuggets.
Play 1 Round.
Equip an emote.
Equip a spray.
Equip a skin.
Win a round after using an escape ability.
Collect 100 Nuggets.
Participate in an event.
Kill a mercenary right after they use their escape ability.
Kill a mercenary as the monster.