How to help the stranger in the sewer in Sell Lemons?

Unlock at least one Alien Investor, run the UFO Key lever sequence in the sewer, collect the key, pull Red and Green again, then deliver it in the secret room / talk to the stranger for Good Samaritan.

How do you get the UFO Key in Sell Lemons?

You need ≥1 Alien Investor or the key will not spawn. From the sewer hub, pull Blue → Red → Green → Red, then follow the green-text route across the multicolored bars to the key pickup.

What is the Good Samaritan Badge in Sell Lemons?

Badge for helping the stranger alien after the UFO Key turn-in. Permanently doubles investor cash bonus from 1% to 2%. About 1.8% earn rate (~273k players).

Should I get UFO Key before Rebirth farming?

Yes. Do the UFO Key / Good Samaritan line before mass Rebirth loops so every future investor pays 2% instead of 1%.

Help the Stranger in the Sewer — Sell Lemons UFO Key & Good Samaritan Badge

UFO Key Overview — Why Do This Before Rebirth

The Sell Lemons UFO Key quest doubles Alien Investor cash bonus forever. That is why serious guides say finish it before Rebirth spam.

Helping the stranger in the sewer is a short mid-game project: spawn the UFO Key with the correct lever order, pick it up, open the secret room, and complete Good Samaritan. Together they move investors from +1% to +2% cash each.

You must hold at least one Alien Investor or the key simply will not appear. Joe the Alien Rebirth unlocks that investor — then come back underground.

Keep this run separate from the Cosmic Cash Vine / Sewer Key clear when possible. Mixing both lever projects in one messy session is the fastest way to “break” the maze.

Once Good Samaritan is done, every later Rebirth and every Evolution rebuild is cheaper in real time because the 2% investor bonus stacks on the whole bank you rebuild.

Sell Lemons UFO Key Walkthrough

Play this Sell Lemons UFO Key walkthrough first — pause at each lever — then follow the step table and tip board below.

Quest Payoffs at a Glance

Key

UFO Key

Spawns in the sewer only after you own ≥1 Alien Investor. Collect it after the Blue/Red/Green/Red sequence.

Badge

Good Samaritan

~1.8% earn rate. Permanent 2% investor cash bonus after turn-in.

2×

Investor math

Every future Rebirth investor is worth double cash %. Do this before farming hundreds of Rebirths.

Hub

Leaderboard center

Respawn to the surface and re-drop to the Most Cash / Fruits boards between pulls.

UFO Key Prerequisites

Skip any of these and the key stays invisible or levers refuse to line up.

Must

≥1 Alien Investor

Rebirth once at Joe first. Without an investor the UFO Key does not spawn.

Recommended

Sewer Key / vine done

Finish the Cosmic Cash Vine unlock in an earlier session so gate progress is already permanent.

Reset

Fresh join

Restart or switch servers before starting so leftover lever states do not poison the order.

Map

Keep map open

Use the sewer map page beside this guide when corridors look identical.

UFO Key Lever Sequence

Verified community order for the Sell Lemons UFO Key run. Pull once per step — double-pulling can soft-lock the route.

UFO Key steps from sewer hub (respawn between most pulls)

Step	Action	Hub hint
1	Pull Blue	Green-text hallway route to Blue switch
2	Pull Red	Past forest/tree gate, left corridor — walk back, no reset needed
3	Pull Green	Opposite green text; multicolored bars landmark
4	Pull Red again	Same Red corridor as step 2
5	Collect UFO Key	Green-text hall → straight past first right → left over multicolored bars → left at third decision across blue/purple lines
6	Pull Red again	Forest gate Red corridor
7	Pull Green again	Same Green route as step 3
8	Secret room turn-in	From hub, opposite green text → left hall → left, right, left into secret room

Respawn (Escape → R) after Blue, Green, and most Red pulls to return to the hub fast.
Pause the walkthrough at each decision if corridor forks look identical.

If doors on the key path stay locked, restart the server and re-run steps 1–4 carefully. Do not improvise Purple/unpull steps from the Sewer Key puzzle unless you are intentionally finishing that vine clear first.

Maze Route Tips Board

Blue

Straight bias

On the Blue run, prefer straight options at early forks until the back hallway yields the Blue switch.

Red

Short corridor

Red is the easy pull — forest gate landmark, single path, walk back to hub.

Green

Bars landmark

Multicolored bars confirm you are on the Green path. Right, right, left, then final right to the switch.

Key

Key only if investor owned

Empty pedestal usually means you still lack Alien Investors — Rebirth once, then return.

Help the Stranger — Good Samaritan Badge

After the secret-room turn-in, talk to the stranger alien to finish Good Samaritan and lock the 2% investor bonus.

The badge sits near 1.8% earn rate with hundreds of thousands of owners — rare enough to matter, common enough that the route is well mapped. The permanent cash-% upgrade is the real reward, not the badge icon alone.

Joe on the surface remains your Rebirth NPC. The sewer stranger is only for this quest line. Mixing the two “alien” searches is why players drop into the wrong hole.

After the badge pops, open the investor panel once to confirm the bonus reads 2% per investor before you leave the sewer — that sanity check catches incomplete turn-ins early.

What to Do After Good Samaritan

Convert the badge into faster Sell Lemons mid-game immediately.

If levers feel wrong after the badge, leave the UFO project alone and run a clean Sewer Key session on a fresh server later. The vine gate and the stranger room are related geography, not the same button order.