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