CelSector Achievements: All 19 and How to Unlock Them
Every CelSector Steam achievement with its condition, the missable story flags, the challenge runs and the grind flags that need a dedicated pass.
Quick answer: CelSector has 19 Steam achievements: six story flags, five collection flags, four challenge runs and four grind counters. Most unlock on a normal playthrough if you clear side rooms. The ones that need planning are Packing Light (pistols only), Untouchable (no grabs), Bring It On (Hard without lowering difficulty) and the four counters.
This page lists every flag with its condition and groups them by the run that clears them. The 100% checklist→ turns this into an order.
Arms Dealer, You Expect Me to Wear This and Hold That Pose all progress on a normal completion run.
The full list
| Achievement | Condition | Type |
|---|---|---|
| No End in Sight | Clear Sector A | Story |
| Down the Drain | Clear Sector B | Story |
| Light at the End..? | Escape the facility | Story |
| Just a Worm | Defeat the giant worm | Hidden story |
| Can't Feel My Face | Be fitted with the Hypnosis Mask | Story event |
| Hold That Pose | Unlock every scene in the Gallery | Collection |
| You Expect Me to Wear This? | Collect every piece of clothing | Collection |
| Arms Dealer | Collect every gun | Collection |
| Filled to the Brim | Max out your capacity | Collection |
| Part of the Family | Spawn one of every kind of creature | Post-game |
| Packing Light | Beat the game using only the pistol | Challenge |
| Untouchable | Beat the game without being grabbed | Challenge |
| Bring It On | Beat the game on Hard without changing difficulty | Challenge |
| Giving In | Surrender for the first time | Action |
| Leave None Alive | Defeat 1,000 enemies | Grind |
| Spray and Pray | Fire 30,000 bullets | Grind |
| Sharpshooter | Get 250 critical kills | Grind |
| Overpopulation | Spawn 100 creatures | Post-game grind |
| A Drop in the Bucket | Let an enemy complete its grab 1,000 times | Grind |
Story flags
Four of the six story flags are unavoidable: clearing A, clearing B, escaping the facility and the Hypnosis Mask event. Just a Worm is the hidden one: you have to find and defeat the giant worm, which is not on the main route.
If you finish the game and the worm flag is still locked, you skipped a side area. The secrets page→ marks the sectors with optional arenas.
Collection flags
Arms Dealer and Filled to the Brim come from sweeping sectors. You Expect Me to Wear This? is the long one: clothing is spread across all six sectors and several pieces sit behind one-way drops.
Hold That Pose is the gallery flag. The gallery fills from story progress and the post-game room, so it is a completion reward rather than a chest hunt. The ending and post-game page→ explains what unlocks when.
Challenge runs
These are the flags that need a dedicated save.
Packing Light — pistols only. The three pistols have infinite ammo, so this is less impossible than it sounds. It is also slow: the starter pistol and revolver cannot clear a crowd quickly, and the laser pistol is the only pistol that handles rows. Plan on using the laser pistol for most of the run and the starter pistol as the fallback.
Untouchable — no grabs. One grab ends the run's eligibility. The practical approach is to kill grabbers first, keep distance and reset your outfit before rooms with web or slime. The grab guide→ covers the enemy types that grab.
Bring It On — Hard without lowering difficulty. The key phrase is "without changing difficulty". If you drop to Normal at a boss, the flag is gone for that save. Start a fresh Hard run and commit.
Grind flags
The four counters are cumulative and do not require a single run:
- Leave None Alive — 1,000 kills. Comes naturally over a completion pass.
- Spray and Pray — 30,000 bullets. The SMG and rifle do this faster than pistols.
- Sharpshooter — 250 critical kills. Aim for heads; the sniper and revolver are the easiest tools.
- A Drop in the Bucket — 1,000 enemy grab completions. This is the slowest flag and the one most players leave for last. The post-game cheats can make it less tedious; see the post-game page→.
Overpopulation and Part of the Family are post-game flags tied to the Sandbox Room. They are not available during the story run.
The three-run plan
| Run | What to clear | Notes |
|---|---|---|
| 1. Normal story | Story flags, collection, gallery | Sweep side rooms; do not rush |
| 2. Hard | Bring It On | Fresh save, no difficulty change |
| 3. Challenge/grind | Packing Light, Untouchable, counters | Combine grind flags with whichever run is convenient |
Packing Light and Untouchable can be attempted on the same run, but that is a masochist's combination. Most players should separate them.
Missable flags
Only the challenge runs are truly missable, because they are tied to a save's conditions. Story and collection flags can be recovered with stage select; the game keeps keycards and lets you replay sectors.
The one exception is Bring It On: once you lower the difficulty on a save, that save cannot earn it. Start a new one.
FAQ
How many achievements does CelSector have? Nineteen on Steam.
Are there multiplayer achievements? No. The game is single-player.
Can I get Bring It On by lowering difficulty at the final boss? No. The flag requires the whole run on Hard without changing difficulty.
Is A Drop in the Bucket required for 100%? Yes, if you count all achievements. It is a counter, not a skill check.
Sources
Official source: CelSector on Steam ↗ · CelSector demo on itch.io ↗ · Steam news and patch notes ↗