Here is the full list of all 81 Lead and Gold - there are Gangs of the Wild West achievements.
Destroy 60 objectives.
Destroy 60 Objectives.
Win 100 matches.
Revive 720 gangmates.
Win 30 conquest matches.
Kill 180 enemies with dynamite.
Tag 800 enemies.
Tag 250 enemies.
Perform a Grand Slam (kill 4 players within a short amount of time) in any multiplayer match.
Kill 2000 enemies.
Destroy 20 Objectives.
Trap 720 enemies.
Kill a developer.
Kill 3 enemies with a single dynamite blast.
Shoot off 250 hats.
Kill 300 enemies using fanning.
Kill 900 enemies using fanning.
Kill 3 enemies within 12 seconds using fanning.
Kill 1000 enemies.
Revive 180 gangmates.
Kill 180 enemies with your sidearm (Gunslinger's revolver not included).
Deliver 30 sacks of gold.
Kill 60 enemies with your sidearm (Gunslinger's revolver not included).
Conquer 180 zones.
Tag 40 enemies.
Trap 180 enemies.
Revive 30 gangmates.
Conquer 30 zones.
Shoot off 4 enemy hats in a row (without dying or killing them)
Kill one and only one of each archetype in a row (without dying)
Kill 7 enemies with headshots in a row (without dying)
Trap 30 enemies.
Killl 30 enemies with dynamite.
Die 300 times.
Kill 20 enemies with your sidearm (Gunslinger's revolver not included).
Be the player delivering the most sacks to base during a round. Repeat 3 times.
Kill 25 enemies with the coach gun in a multiplayer round.
Shoot off 100 hats.
Kill 15 enemies with dynamite in a multiplayer round.
Perform 10 headshots with the Buffalo rifle in a single multiplayer round.
Revive 12 gangmates in a multiplayer round.
Play a multiplayer round without getting killed or knocked down and kill at least 8 enemies.
Kill 50 enemies using fanning.
Rack up 30 kills in a multiplayer round.
Deliver 4 sacks of gold in a single multiplayer round.
Shoot off 15 hats in a multiplayer round.
Kill 20 enemies with fanning in a multiplayer round.
Attain rank 9 in a multiplayer match.
Finish off 20 knocked down (KD) enemies in a single multiplayer round.
As the Gunslinger, deliver 3 sacks of gold and kill 12 enemies in a multiplayer round.
Shoot off 20 hats.
Catch 10 enemies in your traps during a single multiplayer round.
Kill 6 enemies caught in traps in a single multiplayer round.
Kill 3 enemies caught in your traps during a multiplayer round.
Kill 3 enemies with a six shooter without reloading in a multiplayer match.
Play a multiplayer round without getting killed or knocked down and kill at least 4 enemies.
Perform at least 8 head shots in a single multiplayer round.
Kill 250 enemies.
Die 150 times.
Rack up 20 kills in a multiplayer round.
Play all release maps.
Finish off 10 knocked down (KD) enemies in a single multiplayer round.
Score a long range headshot.
Tag 20 enemies during a multiplayer round.
During a multiplayer round, gangmates kill 10 enemies tagged by you.
During a multiplayer round, teammates kill 5 enemies tagged by you.
Collect 8 sacks of gold in a Goldfever (COOP) match.
Win a match.
Kill an enemy.
Win 30 matches involving sacks of gold.
Win 100 matches involving sacks of gold.
Win 100 powder keg matches.
Win 100 conquest matches.
Revive a gangmate.
Revive 5 gangmates during a single game round.
Win 300 Matches.
Destroy 180 Objectives.
Deliver 180 sacks of gold.
Deliver 720 sacks of gold.
Conquer 720 zones.
Kill 720 enemies with dynamite.