Which quest should you start?
| Researcher | Entry check | Main task | Reward |
|---|---|---|---|
| Elsher Tachyon | Sergeant or higher | Three batches of infected samples | GUINEA_PIG; Controllable Infection |
| Manhattan Ristretto | Sergeant or higher | Two crystals and a blueprint | SCOUT-OF-CHERENKOV; cosmetic and rank advancement |
| Yuri Scarlet | Officer, required badges and INITIATION in community documentation | 250 kills in one life, then D-Zero | EXOTIC-EXONERATION; Night Stalker |
Ranks and task steps are community-documented. The linked official badge descriptions establish the named unlocks. Yuri's current in-game prerequisite list matters more than a fixed badge count.
A practical progression order
- Learn the facility objectives. The sector route explains what leads to the next gate; the Underequipped run adds the solo and classless conditions.
- At Sergeant, choose a research task. Manhattan is a collection route through several areas. Tachyon needs credit for specific kills, including two bosses. Speak to the relevant NPC before starting work.
- Use Manhattan's codex to check badge gaps. It records collected badges and documents. For Yuri, community documentation describes highlighted prerequisite badges, rather than a reliable fixed total.
- Take on Yuri when eligible. Night Stalker and Yuri's Blood Handed Retriever challenge belong to the same quest chain. Regalia is its harder classless completion, not another researcher quest.
This is a suggested preparation order, not a claim that the game forces you to finish Tachyon before Manhattan.
Keep the reset rules separate
Tachyon's community guide says death preserves sample progress, but leaving the server resets it. Yuri's simulation has no carried progress: death, leaving or a disconnect ends the attempt. Manhattan's reset behavior is not established by the sources checked here; read her active task before changing servers.
A badge marked enabled is not proof that every older walkthrough still works. Manhattan's official badge is enabled, and the current NPC article describes three collection stages. Older search snippets calling it unobtainable do not reflect that current documentation.
Sources & verification
Checked September 23, 2026. These are source-based guides, not independent in-game playtests. Each walkthrough includes its own detailed evidence links.
- Roblox: GUINEA_PIG; SCOUT-OF-CHERENKOV; EXOTIC-EXONERATION.
- Miraheze community documentation: Elsher Tachyon, Manhattan Ristretto, Blood Handed Retriever.