Alien Isolation Special - 4 Aliens
This scene can be generated by following my instructions for mission 3 twin mod and selecting two additional debug checkpoints:
No.0 M06_SHORTCUT_Final will force the 3rd to spawn after triggering,
No.1 M06_SHORTCUT_Alien_Reveal takes you back for triggering the revealing of of the 4th as shown.
No big deal because the 4th can not remain and is useless in terms of gameplay but interesting anyway.