Direct Answer
Section titled “Direct Answer”FAST! tracks production — the achievement reads the PEAK PRODUCTION RATE, not Maw deposit rate. The official Steam condition is 400 products / min. Current player-tested evidence indicates FAST reads PEAK PRODUCTION RATE, not Maw deposit throughput. Depositing into the Maw can help lag/performance but is not itself the unlock condition. Track Peak Production Rate on a Productivity Display when available to verify you hit the threshold.
What FAST Actually Measures
Section titled “What FAST Actually Measures”The Steam achievement text and multiple player tests point to a single stat: Peak Production Rate. That is the highest products-per-minute value your factory reaches (as shown on a Productivity Display or similar monitor). The achievement does not trigger simply by feeding items into the Maw at 400/min — it requires your production tally to show the peak value.
Tested 400/min Setup
Section titled “Tested 400/min Setup”This is a tested route, not the unique or minimum setup. One tested route uses all three max-speed automatic machines + manual Duck production + the x2 crafting-speed buff; a Proxy Intern on the manual Cash Register can add headroom.
Typical tested steps players used:
- Turn on all three automatic production machines and upgrade them to their highest speed.
- Operate a max-speed manual Duck machine yourself (player-operated manual machine).
- Activate an Anomaly Gambling Crate x2 crafting-speed buff.
- If still short, add a Proxy Intern on a max-speed manual Cash Register machine for extra headroom (optional).
Proxy Intern is optional headroom only — it’s not mandatory in every setup but can help if you’re marginal.
Stuck at 350–390?
Section titled “Stuck at 350–390?”If you stall around the high 300s, let machines ramp, reduce loose-object lag, and retry the buff/setup. A commenter peaked near 358, then unlocked after switching player/Intern roles and retrying. Practical tips:
- Reduce loose-item clutter and physics load (fewer loose objects, fewer animations).
- Make sure the player-operated manual machine is actually being used at full speed.
- Reapply or refresh the x2 crafting-speed buff before attempting another run.
- Try switching which machine the player operates versus an Intern/Proxy if you’re close but not unlocking.
Does Productivity Display Matter?
Section titled “Does Productivity Display Matter?”Track Peak Production Rate on a Productivity Display. The Productivity Display is the reliable place players check the peak value that correlates with the achievement. Use it to confirm you cleared the 400 products/min threshold during a run.
What Does NOT Count
Section titled “What Does NOT Count”- Feeding 400 items per minute into the Maw is not itself sufficient — the achievement watches Peak Production Rate, not Maw deposit throughput.
- Reducing Maw deposit lag may improve the reliability of your run, but Maw deposits alone are not the unlock condition.
Do not assume Maw-feed numbers or other peripheral counters are the trigger; focus on production peak as shown on the Productivity Display.
Does FAST track Maw deposits?
Section titled “Does FAST track Maw deposits?”No. FAST tracks Peak Production Rate, not Maw deposit throughput. Depositing into the Maw can help lag/performance but is not itself the unlock condition. See Troubleshooting for related performance tips.
What is Peak Production Rate?
Section titled “What is Peak Production Rate?”Peak Production Rate is the highest products-per-minute figure your operation reaches (viewable on a Productivity Display). Current player-tested evidence indicates FAST reads PEAK PRODUCTION RATE, not Maw deposit throughput.
Is the three-auto + manual Duck + x2 buff the only method?
Section titled “Is the three-auto + manual Duck + x2 buff the only method?”No. The three-auto + manual Duck + x2 buff is a tested route, not the unique or minimum solution. It’s a practical setup many players reproduced successfully, but you can hit 400/min with other combinations of machines and buffs.
Do I need a Proxy Intern?
Section titled “Do I need a Proxy Intern?”No — a Proxy Intern is optional headroom only. It can provide useful extra output if your setup is marginal, but it is not always required.
How long must I sustain 400/min?
Section titled “How long must I sustain 400/min?”The community evidence and official text reference a peak production threshold. Do not rely on any claimed fixed sustain duration; focus on achieving the peak value shown on the Productivity Display.
Why am I stuck in the high 300s?
Section titled “Why am I stuck in the high 300s?”If you’re stuck in the high 300s, common causes are machine ramp behavior, physics/lag from loose objects, incorrect buff application, or role placement (which machine the player operates). If you stall around the high 300s, let machines ramp, reduce loose-object lag, and retry the buff/setup. Switching player/Intern roles has helped some players who were near the threshold.