# Impossible Mission E020: eighth piece and staircase return

Verified retained laboratory checkpoint:8/36 pieces, SNOOZES1, LIFT INITS4,
zero ofnine password letters. Game incomplete; normal-boot proof outstanding.
All seven prior nonblack memory masks are an exact subset of eight new masks.
HUD12:40:10 follows12:39:32 without a new ten-minute penalty. Two earlier
ordinary deaths remain on the retained chain.32 layouts/70 room entries.

An ordinary room26 terminal SNOOZE freezes the rendered brown robots and black
sphere. Falling leftward from the top platform skips98 and reaches122; the
next fall reaches the vending platform170. Right machine288:Nothing here.
Middle264:eighth card. Left236:SNOOZE code. No unsearched furniture remains
in this room. Return:Left somersault222/170 to central146, Left174/146 to
Left122, Right88/122 to central98, Right150/98 to Right74, Right210/74 to
the top50 and original Right exit. Coordinates come from images only.

The rightward return attempt lost avatar visibility beneath the frozen sphere
on Right122. Another attempt reached the platform but ran past its edge before
the somersault settled. These are retained development failures, and neither
is counted as a verified ordinary death. The selected left/central return
avoids the sphere and gives a complete final inventory check.

Four retained source runs, each one initial laboratory load and no intermediate
restores:room-plan-20261010-091118,091442,091826,092436. The video labels each
source change. It uses all113 observations from the first episode,139 from the
collection prefix,34 from the first ascent prefix, and444 from the final return.
Later failed suffixes of the two middle source runs are omitted. Source plans
and exact frozen helpers are archived separately for every episode. This is
not an uninterrupted game from normal boot.

Replay:50.36s,25fps,960x800,730 selected RGB observations and38.252959 measured
PAL emulated seconds. Full320x200 field enlarged threefold. Zero-order hold at
1x with no interpolation, silent, decision pauses omitted;2s labelled source
hold per episode and4s labelled inventory still. Full video decode passed.
All64 archived source entries verify, including12 common helpers andone extra
room26 helper for each episode. Visual checks include the eighth-card frame,
all source labels, staircase and final inventory.

Complete source-run wall charge:143.478270 seconds including startup, cleanup
and unused later suffixes. This excludes other campaign experiments. Agent GPU
allocation is zero. Bounded joystick inputs, watchdog and neutral cleanup remain
enabled. Separate raster timing diagnostics have no gameplay role. No gameplay
RAM coordinates, hidden contents, trainer or game memory writes. No ROM, private
save-state, raw RAM dump or executable is distributed.

Video SHA256:8aebf74fbf1408e89f6cd3eee08a01eaab76584487c39f00bb47d0a3063676e5
YouTube:https://www.youtube.com/watch?v=FdIvTDkitVs

Related E019 development:room24 vending64/98 was searched in six short windows,
with earlier walking retreat to the left lift, yielding SNO0-to1 while preserving
seven pieces and LIFT4. Bottom desk and chair are one workstation:its separate
laboratory search yieldedNothing and removed both sprites. Do not repeat those
unchanged searches. E019's technical video remains unpublished.

Next:other rooms' furniture, code resupply, general hazard handling, observed
password assembly and reproducible normal-boot completion. E018, E001,
Pengo/Pleiads and the existing lab catalog remain preserved.