Along with a complete overhaul of its layout and composition, the new River City map contains three new features currently unique to River City. These features will roll out to other maps in future updates.

Dynamic Time of Day
Time of Day on the new River City is chosen at random, and is divided into four quadrants:
Dawn
Day
Dusk
Night
For public matches, each quadrant condenses its 6-hour duration into 15 minutes (the maximum match time for Standard Queue matches).
For private matches, the 6-hour quadrant duration will be condensed over whichever match duration is set in the Lobby.
When accessed through Testing Grounds the new River City will currently run through all of the above cycles once, from Dawn to Night.

Breakable Objects
The new River City features an array of interactive/breakable objects:

Trees - can be knocked over by 'Mech and projectile collisions
Statues - can be knocked over by 'Mech and projectile collisions
Street lights - can be knocked over by 'Mech and projectile collisions; the light will go out when knocked over
Flood lights - can be shot out with projectiles; the light will go out when shot
Fences - can be knocked over by 'Mech and projectile collisions
Antennae - can be knocked over by 'Mech and projectile collisions
These objects will not block or slow down 'Mechs or weapons fire.

Single-spawn DropShip drop zones
Players will now drop onto the new River City from one of three DropShip drop zones for their side. The DropShips will leave the battlefield once they have unloaded their 'Mechs.


New Hero 'Mechs:

Thunderbolt "Top Dog" TDR-5S-T

Price: 4,875 MC
Tonnage: 65
Engine: 260 Standard
Top Speed: 64.8 kph
Max Engine Rating: 315
Torso Movement:
80 degrees to each side
20 degrees up and down
Arm Movement:
20 degrees to each side
30 degrees up and down
Armor: 416 (Standard)
Internal Structure: Standard
Weapons & Equipment:
Head: Heat Sink
Left Torso: Medium Laser x4, Heat Sink x3
Center Torso: Heat Sink x2, Engine
Right Torso: Medium Laser x4, Heat Sink x3
Right Arm: Large Laser
Left Leg: Heat Sink x2
Right Leg: Heat Sink x2
Hardpoints:
Left Torso: 4 Energy
Right Torso: 4 Energy, 1 AMS
Right Arm: 1 Energy
Heat Sinks: 23 Single
Jump Jets: 0 (0 Max)
ECM Capable?: No
MASC Capable?: No
Module Slots:
Mech: 1
Consumable: 2
Weapon: 2
Movement Archetype: Medium
Quirks:
Acceleration Rate (Low, Med, & High Speeds): +10%
Deceleration Rate (Low, Med, & High Speeds): +10%
Turn Rate (Low, Med. & High Speeds): +10%
Armor Strength (Full Body): +12.5%
Structure Strength (Full Body): +12.5%
Torso Turn Angle (Yaw): +9
Torso Turn Rate (Yaw): +10%
Energy Range +5%
30% C-Bill bonus
Wolverine "Quarantine" WVR-Q
Price: 4,125 MC
Tonnage: 55
Engine: 275 XL
Top Speed: 81 kph
Max Engine Rating: 360
Torso Movement:
125 degrees to each side
30 degrees up and down
Arm Movement:
30 degrees to each side
35 degrees up and down
Armor: 368 (Standard)
Internal Structure: Endo-Steel
Weapons & Equipment:
Left Torso: Jump Jet
Center Torso: AC/5 Ammo, SRM Ammo, Engine
Right Torso: SRM 6 x2, Jump Jet x2, Double Heat Sink
Right Arm: AC/5, Medium Laser x3
Left Leg: AC/5 Ammo, SRM Ammo
Right Leg: AC/5 Ammo, SRM Ammo
Hardpoints:
Right Torso: 2 Missile, 1 AMS
Right Arm: 1 Ballistic, 3 Energy
Heat Sinks: 12 Double
Jump Jets: 3 (7 Max)
ECM Capable?: No
MASC Capable?: No
Module Slots:
Mech: 1
Consumable: 2
Weapon: 2
Movement Archetype: Medium
Quirks:
Acceleration Rate (Low, Med, & High Speeds): +5%
Deceleration Rate (Low, Med, & High Speeds): +5%
Turn Rate (Low, Med. & High Speeds): +5%
Additional Armor (CT): +9
Additional Armor (RT): +13
Additional Armor (RA): +18
Torso Turn Angle (Yaw): +6
Torso Turn Rate (Yaw): +5%
Ballistic Velocity: +10%
Ballistic Cooldown: +10%
Laser Duration: -10%
Missile Velocity: +10%
30% C-Bill bonus
Gameplay

Assault Game Mode
Turrets have been removed
Ballistic Weaponry

Inner Sphere Autocannon/10 - Ammunition per ton increased from 15 to 20
Clan Autocannons and Clan Ultra Autocannons have had their number of projectiles per volley reduced:
Clan-AC/2 reduced from 2 rounds per volley to 1, damage is now 2.0 per round
Clan-AC/5 reduced from 3 rounds per volley to 2, damage is now 2.5 per round
Clan-AC/10 reduced from 4 rounds per volley to 3, damage is now 3.3333 per round
Clan-AC/20 reduced from 5 rounds per volley to 4, damage is now 5 per round
To compensate for the above changes, adjustments have been made to Clan AC/UAC/LB-X(Slug) ammo counts:
Clan-AC/2 ammo per ton reduced from 150 down to 75 (1/2 ton = 37)
Clan-AC/5 ammo per ton reduced from 90 down to 60 (1/2 ton = 30)
Clan-AC/10 ammo per ton 60 matches IS AC/10 change (1/2 ton = 30)
Clan-AC/20 ammo per ton reduced from 35 down to 28 (1/2 ton = 14)
Energy Weaponry

PPC velocity increased to 1100, up from 950
ER-PPC velocity increased to 1200, up from 1050
Clan ER-PPC velocity increased to 1200, up from 1050
Jump Jets
Class I Jump Jets:
Initial boost off the ground increased from 158 to 220
In-air thrust increased from 50 to 68
Duration of burn (fuel amount) reduced from 4.9 to 4.1
Class III Jump Jets:
Duration of burn (fuel amount) increased from 3.2 to 3.75
Class IV Jump Jets:
Duration of burn (fuel amount) increased from 3.2 to 3.75
'Mech Mobility
When a leg is destroyed on a 'Mech, the 'Mech will slow down to 15km/h before being able to slowly regain speed back to 40km/h max
Additional hits to a legged 'Mech will no longer slow it back down to 15km/h


'Mech Fixes and Changes

Awesome
Weapon visualization passes
Banshee BNC-3M Champion
Fixed an issue where this Champion was providing Bonus C-Bills instead of Bonus XP
Centurion
Ballistic weaponry has been remodeled
Cicada
Weapon visualization passes
Commando
Weapon visualization passes
Dragon
Weapon visualization passes
Ebon Jaguar
Fixed minor cockpit clipping issues
Fixed an issue where the 'Mech would spin non-stop after death
Executioner
Fixed minor cockpit clipping issues
Hellbringer
Phranken pattern improved
JagerMech
Fixed a cockpit texture issue
Spider
Leg hit meshes have been fixed


Quirk Changes

Timber Wolf

TBR-Prime
Left Arm and Right Arm: Reduced Laser Duration from +6% to +4% and Energy Cooldown from -6% to -4%
Left Torso: Removed +3% Laser Duration and -3% Energy Cooldown
TBR-A
Left Arm, Center Torso, and Right Arm: Removed +3% Laser Duration and -3% Energy Cooldown
Left Torso: Reduced Laser Duration from +12% to +8% and Energy Cooldown from -12% to -8%
TBR-C
Left Arm: Reduced Laser Duration from +6% to +4% and Energy Cooldown from -6% to -4%
Center Torso: Removed +3% Laser Duration and -3% Energy Cooldown quirks
TBR-D
Left Arm, Center Torso, and Right Arm: Removed +3% Laser Duration and -3% Energy Cooldown
TBR-S
Left Arm and Right Torso: Removed +3% Laser Duration and -3% Energy Cooldown
Right Arm: Reduced Laser Duration from +6% to +4% and Energy Cooldown from -6% to -4%
Stormcrow
SCR-Prime
Head: Removed +3% Laser Duration and -3% Energy Cooldown
Left Arm and Right Arm: Reduced Laser Duration from +6% to +4% and Energy Cooldown from -6% to -4%
SCR-A
Left Arm: Reduced Laser Duration from +9% to +6% and Energy Cooldown from -9% to -6%
SCR-B
Head: Removed +3% Laser Duration and -3% Energy Cooldown
Left Arm: Removed +6% Laser Duration and -6% Energy Cooldown
Right Arm: Reduced Laser Duration from +9% to +8% and Energy Cooldown from -9% to -8%
SCR-C
Left Torso, Right Torso, and Right Arm: Removed +3% Laser Duration and -3% Energy Cooldown
SCR-D
No changes.


MechLab

'Expanded' View resolution support

The minimum supported resolution for 'Expanded' view is now 1280x720
The Warehouse and 'Mech Stats windows are now exposed through roll-out tabs when running 'Expanded' layout at resolutions from 1280x720 to 1440x900


Host State Rewind Fixes and Improvements

HSR algorithm now rewinds animation state when compensating for ping
Fixed some issues with the HSR algorithm that would contribute to missed shots


Optimizations

Reduced client upstream bandwidth usage by approximately 40-45%
Reduced client downstream bandwidth usage by approximately 20-25%



General Fixes and Changes

Fixed an issue where 'Mechs could sometimes be seen through walls under Thermal Vision
Fixed an issue where lighting under DX11 was slightly darker with MSAA/TXAA on
Fixed SLI issues under DX11. DX9 SLI profile fixes are pending work from NVIDIA
Fixed an issue where the 'With Premium Time Enabled' box in the End of Round Player Stats summary was not displaying the correct XP value
Fixed an issue where the Spider Mastery Bundle could not be purchased from the Store if the player had no empty Mech Bays
Fixed an issue where a 'Mech could power-up prematurely after firing a large number of PPCs
'Mechs now display sparks or collision particles when colliding with geometry
'Mechs now generate audio effects when colliding with geometry
With the introduction of the new River City, the old River City and River City Night maps are no longer available for Public, Private, or Testing Grounds sessions

See you on the battlefield!