If you’ve hit the level cap on an aircraft and you’re staring at an upgrade screen that won’t budge, the bottleneck is almost always the same thing: General Purpose Upgrade Blueprints. Zoll and aircraft blueprints are easy enough to come by, but these things are strictly rationed and if you don’t know where they come from you can waste a lot of time chasing the wrong mode. This guide breaks down every reliable source I know of and how much each one actually pays out, so you can plan your farming around the daily reset instead of guessing.
The reason I bothered writing this down is that the blueprints are a finite resource — unlike zoll, you can’t just grind missions until the number goes up. There’s a hard daily limit on the best source, and once it’s gone it’s gone until the next day. Knowing that cap exists changes how you approach your play sessions, and I’d rather you learn it now than figure it out after burning a sortie for nothing.
What General Purpose Upgrade Blueprints Actually Do
To raise the level cap on one of your aircraft, you need three things: Zoll, aircraft blueprints, and General Purpose Upgrade Blueprints. The first two are the easy part — Zoll comes straight out of missions, and aircraft blueprints are available in the shop and through scrambles. The general purpose ones are the piece that stalls people, because they’re a limited-quantity currency rather than something you can farm indefinitely.
There are exactly three channels that hand them out: Emergency Sorties, the Ace Pass, and Challenges. Everything below is organized around those three, since there’s no secret fourth source worth hunting for.
Emergency Sorties: The Best Source, With a Daily Catch
This is the one you’ll lean on most, and it’s also the one with the tightest leash. A single Emergency Sortie pays out 3 blueprints. If you run another one on the same day, that second run drops to 2 blueprints — so the value falls off immediately after the first clear.
The overall daily cap is 5 blueprints, which in practice means your useful window is that first sortie plus one more. You can check the remaining cap at any point from the mode select screen, and I’d genuinely recommend glancing at it before you commit to a run. Once it reads 0, Emergency Sorties will not produce any more blueprints until the cap resets, no matter how many times you queue in.
Ace Pass Rewards
The Ace Pass is the steady drip — you earn progress as you play, and the blueprint rewards are baked into that track. It’s split across two tiers, and as you’d expect the paid one gives substantially more:
| Ace Pass Tier | Blueprints Earned |
|---|---|
| Regular Ace Pass | 20 blueprints |
| Premium Ace Pass | 60 blueprints |
Twenty versus sixty is a big enough gap that if you’re serious about uncapping multiple aircraft, the premium route is where the real volume sits. The regular track is still worth clearing for whatever you pick up along the way, but don’t expect it to carry you on its own.
Challenges
Challenges are the slow-burn source — less flashy than an Emergency Sortie, but they don’t compete for the same daily cap, so they stack on top of everything else. They’re split into two groups.
Milestone Challenges reward you for putting time into each aircraft role. Playing 50 missions as a Fighter earns 3 blueprints, the same 3 blueprints comes from 50 missions as an Attacker, and 50 missions as a Multirole rounds it out with another 3 blueprints. If you rotate between roles anyway, these will tick up in the background without you having to force anything.
| Milestone Challenge | Blueprints Earned |
|---|---|
| Play 50 missions as Fighter | 3 blueprints |
| Play 50 missions as Attacker | 3 blueprints |
| Play 50 missions as Multirole | 3 blueprints |
Event Challenges are the time-gated ones. Logging in for 5 days hands you 5 blueprints, and destroying 10 enemy units gives another 5 blueprints. These are the easiest pickups on the entire list — the login one especially, since it just asks you to show up.
| Event Challenge | Blueprints Earned |
|---|---|
| Log in for 5 days | 5 blueprints |
| Destroy 10 enemy units | 5 blueprints |
Putting It Together
Between the capped Emergency Sorties, the Ace Pass track, and the role- and event-based Challenges, you’ve got every avenue the game offers for these blueprints. My habit is to knock out the Emergency Sorties early while the cap is full, then let the Challenges and Ace Pass progress in the background during normal play. Watch that cap counter on the mode select screen and you won’t accidentally waste a run.
It’s not a fast grind, but it’s a predictable one once you know where the limits are — and that’s really the whole trick with this currency.