There Are 90 Zones With Waypoints To Tag If You Want To Pop The Locomancer Achievement.
It Seems Like A Lot, But A Large Portion Of Them End Up In Your Path As You Progress Through The Story, And Only 2 Are Missable.
Careful Now: Don't Miss These!!!
-Act 5-
[43] Oriath Square (Inaccessible After Killing Innocence [Replaced With Ruined Square I Think])
[44] The Templar Courts (Inaccessible After Killing Innocence)
When You Get To Karui Shores, If The Achievement Does Not Pop - Press [U] On Your Keyboard And Look Back Through All The Act's Zones.
Any Zone (With A Waypoint) Has A Filled In Blue Circle As The Map Icon If You Have Tagged It's Waypoint. If It Has A Waypoint And You Have Not Tagged It, It's Map Icon Has A Smaller Blue Dot In The Circle Instead. Go Back To These Zones To Find Your Missing Waypoints!
-Below Is A List Of All Currently Available Waypoints-
(Taken And Doubled Checked Against The Wiki)
Act 1
-----------------
[01] Lioneye's Watch
[02] The Coast
[03] The Submerged Passage
[04] The Ledge
[05] The Climb
[06] The Lower Prison
[07] Prisoner's Gate
[08] The Ship Graveyard
[09] The Cavern of Wrath
Act 2
-----------------
[10] The Southern Forest
[11] The Forest Encampment
[12] The Crossroads
[13] The Broken Bridge
[14] The Crypt Level 1
[15] The Chamber of Sins Level 1
[16] The Western Forest
[17] The Wetlands
[18] The Riverways
[19] The Northern Forest
[20] The Caverns
Act 3
----------------
[21] The City of Sarn
[22] The Sarn Encampment
[23] The Crematorium
[24] The Warehouse Sewers
[25] The Marketplace
[26] The Battlefront
[27] The Solaris Temple Level 1
[28] The Solaris Temple Level 2
[29] The Docks
[30] The Ebony Barracks
[31] The Lunaris Temple Level 1
[32] The Imperial Gardens
[33] The Library
[34] The Sceptre of God (3rd Floor)
Act 4
---------------
[35] The Aqueduct
[36] Highgate
[37] The Crystal Veins
[38] The Grand Arena
[39] Kaom's Stronghold
[40] The Harvest
Act 5
---------------
[41] The Slave Pens
[42] Overseer's Tower
[43] Oriath Square (Inaccessible After Killing Innocence)
[44] The Templar Courts (Inaccessible After Killing Innocence)
[45] The Chamber of Innocence
[46] The Ruined Square
[47] The Reliquary
[48] The Cathedral Rooftop
Act 6
---------------
[49] Lioneye's Watch
[50] The Coast
[51] The Ridge
[52] The Lower Prison
[53] Prisoner's Gate
[54] The Western Forest
[55] The Riverways
[56] The Southern Forest
[57] The Beacon
[58] The Brine King's Reef
Act 7
----------------
[59] The Bridge Encampment
[60] The Crossroads
[61] The Crypt
[62] The Chamber of Sins
[63] The Den
[64] The Ashen Fields
[65] The Northern Forest
[66] The Causeway
[67] The Vaal City
Act 8
----------------
[68] The Sarn Ramparts
[69] The Sarn Encampment
[70] The Toxic Conduits
[71] The Grain Gate
[72] The Imperial Fields
[73] The Solaris Temple
[74] The Solaris Concourse
[75] The Bath House
[76] The Lunaris Concourse
[77] The Lunaris Temple
Act 9
----------------
[78] The Blood Aqueduct
[79] Highgate
[80] The Vastiri Desert
[81] The Foothills
[82] The Tunnel
[83] The Quarry
Act 10
----------------
[84] Oriath Docks
[85] The Ravaged Square
[86] The Control Blocks
[87] The Reliquary
[88] The Desecrated Chambers
Epilogue
-----------------
[89] Oriath
[90] Karui Shores
Other Waypoints That Might Count
(Check These If The Previous 90 Did Not Pop Your Achievement)
--------------------
- Aspirants' Plaza (Called Labs For Short, Has A Waypoint Outside [Before You Select The Difficulty Of The Area Dungeon])
- Your Hideout (Unlock A Hideout By Progressing In The Game)
- The NPC "The Gondolier", In The Rogue Harbour (Use The Rogue Coins To Open A Portal)
- Mine Encampment (Progress Through The Game Until You Meet Niko And Visit His Encampment)
- The Menagerie (Progress Through The Game Until You Meet Einhar And Visit His Encampment)
- Tane's Laboratory (Progress Through The Game Until You Meet Tane And Visit His Lab)
Achievement Pops In-game And On Steam As Soon As You Get The Last One.
Good Luck!