M37 SPG Kewell Roberts
Engines
Tier 1 

Silent HP Engine 15 30 25 
Tier 2 

Silent HP Engine II 20 65 35 
Tier 3 

Silent HP Engine III 25 100 50 
Chassis
Tier 1 

Infantry Chassis 200 100 25 
Tier 1 

OpenTop Chassis 65 15 35 45 
Tier 2 

Infantry Chassis II 965 300 70 
Tier 2 

OpenTop Chassis II 240 40 95 115 
Tier 3 

Infantry Chassis III 1295 520 120 
Tier 3 

OpenTop Chassis III 430 70 160 190 
Armors
Tier 1 

Light Rolled Riveted Armor 45 25 
Tier 1 

Light Welded Rolled Armor 65 25 10 
Tier 1 

Light Composite Armor 175 10 
Tier 1 

Light Tempered Upgraded armor 95 35 30 
Tier 2 

Light Rolled Riveted Armor II 145 70 
Tier 2 

Light Welded Rolled Armor II 175 60 30 
Tier 2 

Light Composite Armor II 360 20 
Tier 2 

Light Tempered Upgraded Armor II 190 65 45 
Tier 3 

Light Rolled Riveted Armor III 240 115 
Tier 3 

Light Welded Rolled Armor III 260 90 45 
Tier 3 

Light Tempered Upgraded Armor III 290 100 60 
Tier 3 

Light Composite Armor III 540 30 
Shells From game version 1.8.7.39
Tier 1 
Level 3 
HCHE (M) 26085 
Range  7180 
Tier 1 
Level 5 
LDHE (M) 4956055 
Range  7180 
Tier 2 
Level 3 
Concave HCHE (M) 70520570 
Range  7180 
Tier 2 
Level 5 
BBERHE (M) 111512580 
Range  7180 
Tier 3 
Level 3 
RPBBERHE (M) 161518095 
Range  7180 
Tier 3 
Level 5 
Concave Elongated HCHE (M) 1240355115 
Range  7180 
Tier 1 
Level 4 
ATT (M) 315115 
Range  3350 
Tier 1 
Level 6 
Shaped WSAT (M) 230235 
Range  3350 
Tier 2 
Level 1 
FSATT (M) 63022560 
Range  3350 
Tier 2 
Level 5 
Tandem AT (S) 845355 
Range  3350 
Tier 2 
Level 6 
Shaped WSFSAT (M) 48547580 
Range  3350 
Tier 3 
Level 1 
CFS ATT (M) 1085420100 
Range  3350 
Tier 3 
Level 4 
CFS Tandem AT (S) 126552550 
Range  3350 
Tier 3 
Level 6 
Shaped CFS WSAT (M) 745715120 
Range  3350 
Illustration :
Official artwork
How to unlock:
Appears in BWMG Depot LV2
Dogtag
x 39
Test Doll
x 287
Blueprint N5
x 35
S5
Camouflage
x 1
Silver
x 2 170 000
Terrain performance based on chassis and engine bonus
Warning : This is only an approximation and a workinprogress.
 Some metal maidens may have more than one type of engine/chassis and therefore can not accumulate all the bonuses from theirs engines/chassis at the same time.
 You also have to take into account the range of the ammo available for your metal maiden for each terrains
Dirt streets
Adequate equipment : 0 out of 3
 Penetration
 Detection
 Critical resistance
Missing: [rear] [w proof] [low]
Rocky streets
Adequate equipment : 1 out of 3
 Armor
 Critical resistance
Missing: [rear] [w proof] [low] [tires]
Snow streets
Adequate equipment : 1 out of 3
 Damage received
 Critical resistance
Missing: [rear] [w proof] [low] [tires] [c proof]
Grass forest
Adequate equipment : 1 out of 1
Missing: [rear] [w proof] [low] [tires] [c proof]
Dirt forest
Adequate equipment : 1 out of 3
 Penetration
 Detection
Missing: [rear] [w proof] [low] [tires] [c proof]
Rocky forest
Adequate equipment : 2 out of 3
 Armor
Missing: [rear] [w proof] [low] [tires] [c proof]
Snow forest
Adequate equipment : 2 out of 3
 Damage received
Missing: [rear] [w proof] [low] [tires] [c proof]
Grass hills
Adequate equipment : 0 out of 1
 Evasion
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof]
Desert hills
Adequate equipment : 1 out of 3
 Damage received
 Evasion
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Desert plains
Adequate equipment : 2 out of 3
 Damage received
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Desert valley
Adequate equipment : 2 out of 3
 Damage received
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Rocky valley
Adequate equipment : 2 out of 3
 Armor
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Snow valley
Adequate equipment : 2 out of 3
 Damage received
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Grass plains
Adequate equipment : 1 out of 1
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Dirt plains
Adequate equipment : 1 out of 3
 Penetration
 Detection
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Snow plains
Adequate equipment : 2 out of 3
 Damage received
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Crushed ice streets
Adequate equipment : 1 out of 3
 Damage received
 Critical resistance
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Shoals forest
Adequate equipment : 1 out of 3
 Damage received
 Detection
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Shoals hills
Adequate equipment : 0 out of 3
 Damage received
 Detection
 Evasion
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Muddy snow forest
Adequate equipment : 2 out of 3
 Penetration
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Crushed ice valley
Adequate equipment : 2 out of 3
 Damage received
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Rocky desert plains
Adequate equipment : 2 out of 3
 Armor
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
Rocky desert streets
Adequate equipment : 1 out of 3
 Armor
 Critical resistance
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof]
River hills
Adequate equipment : 0 out of 3
 Fire resistance
 Penetration
 Evasion
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof] [moisture counter] [buoyant]
River streets
Adequate equipment : 0 out of 3
 Fire resistance
 Penetration
 Critical resistance
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof] [moisture counter] [buoyant]
River valley
Adequate equipment : 1 out of 3
 Fire resistance
 Penetration
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof] [moisture counter] [buoyant]
Spore plains
Adequate equipment : 1 out of 3
 Probably fail to attack
 Critical resistance
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof] [moisture counter] [buoyant] [energized] [brisk]
Spore valley
Adequate equipment : 1 out of 3
 Probably fail to attack
 Critical resistance
Missing: [rear] [w proof] [low] [tires] [c proof] [s proof] [d proof] [moisture counter] [buoyant] [energized] [brisk]
Quotes
From  Quote 

Intro  Hello, I am the new Metal Maiden. 
Main screen #1  
Main screen #2  
Main screen #3  
Main screen #4  
Main screen #5  
Main screen #6  
On upgrade  
Preattack #1  
Preattack #2  
Preattack #3  
On attack #1  
On attack #2  
On attack #3  
On attack #4  
On attack #5  
On attack #6  
On attack #7  
Getting hit  
Upon destruction  
Assignation to a squad  
Adding essential equipment #1  
Adding essential equipment #2  
Adding essential equipment #3  
Adding essential equipment #4  
Adding equipment to a slot #1  
Adding equipment to a slot #2  
Adding equipment to a slot #3  
Unequip all gear  
Battle victory #1  
Battle victory #2  
Battle victory #3  
Battle loss  
Fate 