New map and mechanics:
Lyndon Beach (林登海滩)
A coastal-type map, tied to the new regime mechanics with toxic zones.
The "Poison/Samples" mechanic
A key feature of the season.
Samples:
Picked up from transported objects
If carried for too long, the sample disappears
The sample drops when you die
Mixer (mixes gas samples, disassembled here):
Analyzes samples
Requires precise synchronization, error = start over
Can be destroyed or blocked by enemies
Poisonous gas:
Activates after analyzing a sample
Deals damage
Requires a gas mask, filters need to be changed in time
New weapons and known modules for them:
GRT-CPS (GROTC) — 16”, 20”, 14.5”
VCR-2 (VHS2) — 18” US / 18” DMR / 16” / 20”
M121 A2 (MG5) — 550 / 660 / 460 mm
New magazine
Belt Drum for 50 rounds
New equipment:
Machete
Gas mask (a key feature of the season)
HTI-Mk2 (Lancet)
9K38 Igla
New cold and special weapons:
TR-7 "Thermal"
18.5 KSK "Instinct"
M27 IAR "Death Scythe"
Five-Seven "Moon Pack"

️Weapon pack from the store:
(translated the names where possible - according to the meaning)
UMG40 - "Bamboo Explosion" / "Deadly Whisper"
M433 - "Blue Dot" / "Light Storm"
SV98M - "Mutation" / "Silent Forester"
SIG553R - "Corruption"
Season 2 is clearly built around zone control, timings, and equipment.