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