Alright, after me and @ordinary_ryxt have played through CI3U in it’s entirety, here’s a list of oddities and/or bugs we’ve encountered:
SPOILERS AHEAD
The “welcoming committee” himself is not present during the prologue cutscene. (He does not come out of the Yolk Star.)
Boss theme starts prematurely during prologue.
No screen shake and boss chicken cry during prologue boss.
“And… stay out!” shows up early. (It shows up before “Outstanding!” shows up)
Prologue boss drops a powerup.
There’s inexplicably a warp sequence after killing the prologue boss.
Fp10 and weapon are maintained after prologue. You do not drop to an Fp0 Ion Blaster.
Weapon drops have been shifted ahead one stage. (Because the Prologue is considered as stage 1)
Stage 1’s (The Great Unknown) “So begins your adventure…” is missing.
Prologue stage counts as wave and stage 1, which screws with wave skipping.
Balloon “raspberry” noise is not present. (But on Wave 108, the sound is there)
Wave 5 (Inbound Missile Strike! and it’s variants): Missiles do not drop coins.
Wave titles are not like they were in CI3 (Subtitles and Format, mostly. Not the wave names).
Treasure Shower should be “Bonus Challenge!”.
Wave 15 (Entering egg-drone minefield) Title is missing an exclamation mark.
Stage 2 (Cygnus Galactic Arm) Cutscene (Restaurant Sign) is missing the Car Screech sound when hero is asked to stop.
Stage 2 Cutscene plays explosionPlayer.ogg for the Saucer.
Chicken Huddle Wave: Enemies do not rotate in a circular motion like they do in CI3.
Later wave variants use the same names (except Partner Acrobatics). Might be intended.
Wave 25 (Eggship fly-by, and it’s variants): Eggships seem smaller than they used to be.
Wave 32 (Terminator Chickens): Missing “They’ll stop at nothing!” subtitle.
Stage 5 (Comet Chase): Clean sweep present, but no pecking order. Might be intended.
Wave 70: U.C.O. #3 is missing it’s red laser.
Wave 72 (Entering egg-drone minefield): Egg Drones come in twos, and then ones.
Wave 75 (We’re Surrounded!): Speed is the same as Wave 18’s.
Stage 10 (Meteor Storm) is missing wave numbers for each wave title.
Wave 99: Missing Subtitle “Last one!”
Wave 115 (Jupiter) and 118 (Venus): Chickens spawn with normal coloured shirts, rather than their checkered patterns.
Wave 120: Yolk Star only has 3 waves of Terminators. Might be intended.