Delta Force S10 Nuclear Fission Guide – Maps, Operators & Weapons

Delta Force Season 10, codenamed "Nuclear Fission" , launched on June 26, 2026, and it is the longest season the game has run to date — a full 100 days, ending around October 4, 2026, and covering the entire summer. Team Jade used the season to push two disaster-themed maps, two new operators, a weapon-system overhaul, a playable-boss mechanic, and a stack of quality-of-life systems that players had requested for months. If you skipped the S9 closeout, S10 is the moment to come back, because the content density is the highest the tactical shooter has shipped.

A Delta Force top-up at Topuplist through the official Topuplist storefront is the simplest way to keep your Havoc Coins and battle-pass progress ready for a season this long, especially with the boss-play and Black Ice events running in parallel.

Season 10 "Nuclear Fission" at a Glance

S10 is built around catastrophe. Rather than a single new region, the season delivers two Operations/extraction maps and one Warfare map, each with an environmental hazard that changes how you fight. The Operations side gets the radiation-soaked AZ3 Nuclear Power Plant and the extreme-cold White Storm, while Warfare gets the fire-swept Claudius Colosseum. On top of maps, S10 introduces the cryo-control Engineer Liquid Nitrogen and the support healer Zeriya, two heavy-caliber rifles, an underbarrel grenade launcher, the game's first Nepal-style premium melee weapon, and the Demulan playable-boss system. System-level additions include a warehouse secondary password, death replay, a permanent shooting range, and custom rooms.

The season framing matters for planning: a 100-day window means you are not racing a six-week sprint. Battle-pass tiers, event calendars, and limited collab windows (like the Rainbow Six Siege crossover that runs inside S10) all overlap, so the smart play is to map your priorities early rather than binge at the end.

AZ3 Nuclear Power Plant: Radiation and the Meltdown Clock

The headline Operations map is AZ3 Nuclear Power Plant, a three-layer structure split into nine functional zones with ventilation ducts and equipment mezzanines built for close-quarters indoor fighting. Its signature mechanic is global dynamic radiation: step into a contaminated zone without protection and you take continuous damage, your vision blurs, and your maximum health is chipped away. The reactor at the map's core periodically heats up, triggering an emergency shutdown event — grab the shutdown button and your squad is rewarded with rich loot, but if multiple factions fail to contain it, the plant goes critical and the entire map collapses into a nuclear-blast shrinking zone.

Deep underground, a red-tier boss named H1000 "The Destroyer" guards the core area, dropping gold-tier gear on defeat. AZ3 opens in Normal and Confidential difficulties, and crucially it has only two extraction points (a speedboat and a road exit), which keeps the endgame tense. High-value loot clusters in the heaviest radiation zones, so the risk-reward math is brutal but rewarding for prepared squads.

AZ3 Loot Routes, Extraction Points, and Radiation Survival

Because AZ3 compresses loot into radiation pockets, route planning is everything. Most squads run a radiation-suit-first economy: buy or loot a protective suit before pushing the core, then stage a support player at the ventilation mezzanine to watch both the reactor shutdown and the two extract lanes. The speedboat extract favors fast, low-contact exits after a successful shutdown grab, while the road exit suits squads carrying heavier gold-tier hauls from H1000.

Consumables decide survival more than guns here. Rad-away syringes, the suit itself, and a spare canister of coolant for the mid-fight are the difference between a clean extract and a meltdown death. The blurring vision debuff also makes audio cues — footsteps on the metal grates, the reactor alarm — more important than sightlines, so a coordinated squad using pings beats a lone wolf with better aim almost every time. If you intend to contest H1000 repeatedly across the 100 days, a Delta Force top-up from Topuplist keeps your crate and pass currency stocked, and you can compare bundles on the main Topuplist page before committing.

White Storm: The First Arctic Map

White Storm is Delta Force's first arctic / extreme-cold map, roughly 1.5 times the size of Longbow Valley and built for 16-player Operations matches. The cold drains health over time, random blizzards blank out sightlines, and your movement leaves snow footprints that tracked enemies can follow. The design leans into long-range ratting and supply-line ambushes rather than the tight indoor brawls of AZ3 — you'll want campfires inside buildings to ward off frostbite and a different loadout philosophy entirely. Together, the two maps give S10 a rare tonal split: one about claustrophobic radiation survival, the other about open frozen tracking.

White Storm Cold-Weather Loadouts and 16-Player Squad Play

White Storm rewards patience. With 16 players spread across a 1.5x Longbow footprint, the early game is about securing a warm building and a campfire before the first blizzard, then rotating along ridge lines where snow footprints betray careless pushes. Long-range marksman rifles shine here, and the blizzard windows are your best friend for repositioning unseen. The footprint also means solo ratting is viable, but a four-stack using comms to "walk the footprints backward" can hunt a fleeing squad with frightening efficiency.

Gear discipline matters: carrying a heater or stacking cold-resist consumables lets you hold an outdoor lane that would freeze a careless enemy. Because the map is so large, decide pre-drop whether you are looting (quiet,边缘, slow) or hunting (aggressive, central, fast) — half-measures get you caught in the open during a blizzard with no campfire in range.

Claudius Colosseum: Fire Warfare

On the Warfare side, Claudius Colosseum takes the opposite approach with a fire-spread mechanic that ripples across the whole map — stand in flame and you burn. The map embeds eleven 20mm Vulcan cannons as fixed emplacements and spawns a CSV-35 tilt-rotor transport helicopter (seating three gunners) for vertical play. It is the loudest, most chaotic of the S10 maps, a deliberate counterpoint to the methodical extraction pacing of AZ3 and White Storm, and a good place to burn excess battle-pass XP. The fire patches also create temporary no-go zones that reshape objective control round to round, so the smart team treats the flames as a soft wall rather than an obstacle to ignore.

New Operator: Liquid Nitrogen (Cryo Control)

Liquid Nitrogen, real name Gabriel Murrill, is an Engineer / hard-control operator and the season's standout. His backstory — a former nuclear-facility cooling engineer dismissed after a major accident and later reactivated by G.T.I. — feeds directly into his kit. His signature line, "I will never make the same mistake again," sums up a control fantasy built entirely around cold.

Passive – Cryo Attachment: all skills and basic attacks stack a cold debuff that slows enemies; at max stacks the target is frozen solid for roughly 3–5 seconds, unable to move, shoot, or reload (they can manually break free). It also works on vehicles, degrading enemy handling.

Tactical – Dewar Canister: throws a wide cryo vapor cloud that continuously stacks cold, forces coughing (revealing position), deals damage, and slows. It cannot be destroyed by gunfire, making it ideal for locking corridors, stairwells, and extraction points.

Ability – Thermal Tracking Shock Grenade: a homing shock grenade that auto-marks enemies carrying the cold debuff, revealing their silhouettes through walls while blurring their vision — recon and crowd control in one.

Ultimate – Rapid-Fire Cryo Grenade Launcher: a 6-round launcher that paints frost patches, persistent slow, and damage; holding fire accelerates the rate.

Liquid Nitrogen Team Comps and Counters

Liquid Nitrogen anchors a freeze-and-hold comp: pair him with a high-damage assault who deletes frozen targets during the 3–5 second window, and a Zeriya (or any healer) to keep the freeze line alive under return fire. On AZ3 specifically, his cryo cloud is devastating in the narrow ventilation ducts where enemies cannot disengage. The main counter is spacing — his freeze requires stacking cold, so enemies who peek one at a time and break freeze manually deny the full lockdown. Smoke and flash can also scramble his Thermal Tracking mark. Drafting him into a squad that already runs a dedicated healer is what unlocks his ceiling, because the freeze window is only as valuable as the follow-up damage behind it.

New Operator: Zeriya (Support Healer)

Zeriya is the season's support operator and quickly became the go-to healer for coordinated squads. She deploys a healing drone and a supply bunker barrier, and her passive speeds up team rescues while her built-in radiation resistance makes her unusually durable on AZ3. For a version where one map punishes you for merely standing in the wrong zone, a healer who shrugs off radiation is a force multiplier, and she pairs naturally with Liquid Nitrogen's lockdown style: freeze them, then revive and re-position your team behind the barrier.

Pairing Zeriya with Liquid Nitrogen

The Zeriya + Liquid Nitrogen duo is the S10 signature combo. Liquid Nitrogen locks a lane with the Dewar Canister and freezes anyone who steps in; Zeriya drops the bunker barrier behind the freeze line, heals through return fire, and instantly revives a teammate who overextended into the cloud. On AZ3's radiation floors this pairing is doubly strong because Zeriya's resist lets her stand in zones that would melt a normal support. The only weakness is a flank — both are utility-heavy, so a fifth player running aggressive recon to warn of rotations is what turns the duo from good into oppressive.

New Weapons, Attachments, and the Dirge Knife

S10 reshapes the mid-to-long-range gun meta with two new rifles and a wave of attachments:

RM277 assault rifle (6.8×51mm) — ballistics close to the M7, a stable all-rounder.

SVCH designated marksman rifle (7.62×54R) — supports full-auto but caps near 20 rounds.

GROZA high-rate-of-fire assault rifle joins the pool.

Underbarrel grenade launchers now fit mainstream assault rifles and light machine guns, massively boosting close-range clear potential.

The first Nepal-style combat knife, "Dirge", arrives with a unique harmonica-inspect animation.

The Refreshed Gun Meta: M7, AR57, and Underbarrel GL

Beyond the headline rifles, S10's balance pass reshaped the field. M7 and AR57 received across-the-board buffs, making them the close-range kings of the season, while the underbarrel GL turned otherwise passive rifle loadouts into room-clearing tools. The net effect is a more forgiving early-game gunpool: new players can lean on the buffed M7 while veterans experiment with RM277/GROZA mid-range. The gun ecosystem is deeper than ever, which matters because S10's Black Tide Breach mode (covered in a separate guide) lets you customize attachments on the fly and rewards mastering the new recoil profiles.

Demulan Boss Playable and System Updates

A fan-favorite novelty is the Demulan playable-boss system: spend Havoc Coins in-match to transform into the boss with three signature skills — hacker scan (reveals enemy gear and armor quality), pulse bomb (disables electronic attachments and blinds), and Blue Eagle bombing (calls in helicopter area fire). It flips the extraction loop into a "hunt or be hunted" power fantasy. On the systems side, S10 finally delivered the warehouse secondary password (anti-theft lock), death replay for self-review, a permanent shooting range, and custom rooms, plus the seasonal rank reset and the themed S10 Battle Pass with legendary red skins and operator cosmetics.

S10 Battle Pass and 100-Day Pacing Plan

The S10 Battle Pass is the spine of the 100-day grind. Rather than cramming, split it into three phases: Weeks 1–4 focus on the AZ3+H1000 loop and claiming the warehouse PIN and rank-reset rewards; Weeks 5–9 chase White Storm loot and the Colosseum Warfare dailies for steady XP; Weeks 10–14 clean up the Black Ice crossover tiers and any operator crates before the October 4 cutoff. Because the pass is time-gated by play, not by a hard paywall, free-to-play players who log in consistently will finish it — but spenders who want the legendary red skins early benefit from a Delta Force top-up via Topuplist, and the Topuplist dashboard lists every supported title in one place so you can spread credit across your roster.

How to Prepare for S10

With a 100-day season, pacing matters more than a typical sprint. Prioritize: finish the S9 closeout rewards before they expire, unlock the warehouse PIN on day one, learn AZ3's two extraction routes and the reactor shutdown timing, and decide whether Liquid Nitrogen or Zeriya fits your squad before spending. The radiation and cold mechanics punish under-prepared kits, so bring the right consumables per map. The official Delta Force news hub posts the patch notes and event calendars, and aggregated breakdowns on Delta Force Tools map out operator numbers as the meta settles.

If you would rather not ration your battle pass or crate pulls, a Delta Force top-up via Topuplist is the easiest way to stay active across the full 100 days, and the Topuplist dashboard lists every supported title in one place.

FAQ

Q1: When did Delta Force Season 10 launch and how long is it?
A: S10 "Nuclear Fission" launched June 26, 2026, and runs 100 days, ending around October 4, 2026.

Q2: What are the new S10 maps?
A: AZ3 Nuclear Power Plant (radiation, Operations), White Storm (arctic, 16-player Operations), and Claudius Colosseum (fire, Warfare).

Q3: Who are the new operators in S10?
A: Liquid Nitrogen (Gabriel Murrill), a cryo-control Engineer, and Zeriya, a radiation-resistant support healer.

Q4: What is the Demulan boss playable system?
A: Spend Havoc Coins in-match to transform into the Demulan boss with hacker scan, pulse bomb, and Blue Eagle bombing skills.

Q5: What new weapons arrived in S10?
A: RM277 and GROZA assault rifles, the SVCH marksman rifle, underbarrel grenade launchers, and the Dirge Nepal knife, plus M7/AR57 buffs.

Q6: What quality-of-life systems shipped in S10?
A: Warehouse secondary password, death replay, a permanent shooting range, custom rooms, and the seasonal rank reset.