You are the Controller of RAF No. 11 Group Operations Room at RAF Uxbridge, August–September 1940. The Battle of Britain is at its height. Luftwaffe raids are crossing the Channel daily — your job is to detect, intercept, and destroy them before they reach their targets.
You do not fly. You command. Every squadron scramble, every vector, every decision about when to hold back and when to commit — that is yours.
Chain Home radar detects incoming raids as they form up over France. When a raid enters CH range, the simulation pauses automatically — an alert card appears showing estimated strength, altitude, and approach corridor. The game resumes only when you click ACKNOWLEDGE. If two raids are detected simultaneously, the pause holds until both are acknowledged.
In degraded weather, CH effectiveness drops and raids may appear with less warning. If a CH station has been badly damaged, raids approaching through that gap may reach the coast with no CH warning at all — appearing already inland via Observer Corps contact.
Click an incoming raid token on the map, then select INTERCEPT in the tasking panel and choose a squadron. You may assign multiple squadrons to the same raid:
When you scramble matters as much as what you scramble. Squadrons sent up early have time to climb to height, form up, and position with the sun behind them. Squadrons sent up late are still climbing when the raid arrives — disorganised and at a severe disadvantage.
The Engagement Card ticker will immediately report which condition applies: "↑ HEIGHT ADV — early scramble" or "↓ LATE SCRAMBLE — climbing through the raid." The difference between a well-timed and a panicked scramble is nearly double the kill rate.
The two fighter types have distinct roles. This is not cosmetic — which type you assign to a raid directly determines whether the Bf109 escort is engaged or stays tight on the bombers.
The Engagement Card will immediately confirm: "Spitfires engaging Bf109 escort — bombers exposed" or "No Spitfires on this raid — escort tight on the bombers." Spitfire squadrons are a limited and precious resource. On a heavily escorted raid, a Spitfire squadron covering the Hurricanes is worth more than a third Hurricane squadron.
When a raid completes its attack and turns for home, it does not vanish immediately — it egresses across the map marked ↩ WITHDRAWING or ↩ ABORTING. You can assign squadrons to pursue it. Pursuit kill rates are lower than head-on interception (~55% efficiency) but every bomber destroyed on the way home is one that cannot return tomorrow. Pursuing squadrons RTB automatically once the raid exits the map.
When a squadron makes contact with a raid, an Engagement Card appears showing enemy composition, RAF squadrons engaged, a live R/T ticker with tally-ho calls and combat reports, loss bars for both sides, and an outcome banner when the engagement resolves. Cards auto-dismiss after the time configured in ⚙ Settings, or close manually with ×.
The ticker reports decision consequences in real time. Look for altitude advantage lines ("↑ HEIGHT ADV" or "↓ LATE SCRAMBLE") and escort status ("Spitfires engaging escort" or "escort tight on bombers") — these tell you immediately whether your tasking choices are working. The resolved card shows the final kill ratio for that engagement.
The loss bar shows confirmed kills only — figures are accurate. Overclaiming is applied separately to the intelligence reports your pilots file, matching the historical 2–3× inflation seen in RAF claim records throughout the battle.
The Luftwaffe operates across four escalating campaign phases and adapts to your decisions:
The AI remembers which corridors suffer heavy losses and routes around them. It tracks how quickly you scramble, and which sectors you leave lightly defended. From Phase 2 onward it may employ the Freie Jagd (sweep-then-strike) tactic:
Bombers that reach their targets cause cumulative damage shown as pulsing markers on the map. Above 75% damage a sector airfield becomes unserviceable and based squadrons relocate automatically. Damage repairs slowly overnight.
Uncontested raids are disproportionately dangerous. A formation that reaches its target without being engaged can bomb from altitude in neat formation — accuracy and concentration are maximum. A raid that has fought its way through is scattered and shaken. The bombing damage modifier:
Chain Home stations can also be damaged. A badly damaged station creates a radar blind spot — raids approaching through that coverage arc skip the CH pause entirely and may appear already inland. Watch the map for greyed station icons indicating degraded coverage.
When no raids are on the plot, the ADVANCE WATCH ▸ button skips time forward until the next contact — up to 45 game-minutes. Any pending ops brief or shift handover is flushed before the skip. During the lull, intelligence fragments and maintenance reports appear in the message log — read them. They may contain Y-Dienst intercepts suggesting what is coming.
The campaign runs from 10 August to 17 September 1940. The RAF won historically not by destroying the Luftwaffe, but by refusing to be destroyed. Hitler's invasion required air superiority by mid-September for the Channel weather window — when Dowding's fighters kept showing up, Sea Lion was called off. Survival is victory.
The second defeat condition is historically the more dangerous one. In late August 1940 Biggin Hill, Kenley, Hornchurch and North Weald were all repeatedly attacked. It was Göring's switch to bombing London on 7 September — not RAF victories in the air — that saved the sector stations and turned the battle. Protect your airfields.
The Campaign Status panel shows RAF fighters remaining (warn below 180, critical when approaching defeat threshold) and Luftwaffe bombers counting down from 980. Every bomber destroyed on every raid — inbound, at target, or in pursuit — permanently reduces the German pool.