: It appears that they had 2 achievements planned for Keyes, one being
: "Skin_diver" and the other "bloodthirsty".

: For bloodthirsty, at first glance it appears it is exactly what we have in
: H1A/MCC as an achievement, where you need to kill all the specop covenant.
: Some of the logic behind the script doesn't look like at first glance it
: would totally work, due the way the AI respawn but this script could have
: existed before that respawn system for spec op elites was added in.

: For skindiver, things are les clear. In the big pool of coolant before you go
: up the grav lift, a flood form should spawn inside the coolant pool, who
: has multiple parts of his body blown off. If you go in and kill him, it
: would unlock the medal.

: As far as when you would see your accomplishments rewarded, there is not much
: there to give us any idea of how it would work. It could have been mid
: mission, it could have been a post mission thing from what I can tell on
: how this is all set up.

: Here is the original code for anyone who wants to see. Even without knowledge
: of halo's scripting language, it should be understandable to most of you.

: (script dormant i_am_skin_diver
: (ai_place med1_flood )
: (object_set_permutation (list_get (ai_actors med1_flood )0 )"head"
: "~damaged" )
: (object_set_permutation (list_get (ai_actors med1_flood )0 )"left
: arm" "~damaged" )
: (object_set_permutation (list_get (ai_actors med1_flood )1 )""
: "~damaged" )
: (object_set_permutation (list_get (ai_actors med1_flood )2 )""
: "~damaged" )
: (object_set_permutation (list_get (ai_actors med1_flood )2 )"left
: arm" "~damaged" )
: (object_set_permutation (list_get (ai_actors med1_flood )3 )""
: "~damaged" )
: (object_set_permutation (list_get (ai_actors med1_flood )4 )"right
: arm" "~damaged" )
: (object_set_permutation (list_get (ai_actors med1_flood )4 )"left
: arm" "~damaged" )
: (sleep_until (= 0 (ai_living_count med1_flood )))(set skin_diver true ))

: (script dormant more_blood_for_me
: (sleep_until (> (ai_living_count enc5_7_cov/specops )0 ))
: (sleep_until (= 0 (ai_living_count enc5_7_cov/specops )))
: (sleep_until (> (ai_living_count enc7_1_cov )0 ))
: (sleep_until (= 0 (ai_living_count enc7_1_cov )))
: (sleep_until (> (ai_living_count enc7_3 )0 ))
: (sleep_until (= 0 (ai_living_count enc7_3 )))(set bloodthirsty true ))

: (script dormant award_ceremony
: (if skin_diver (print "skin diver medal awarded!" ))
: (if bloodthirsty (print "bloodthirsty medal awarded!" )))
: end of third script

Interesting. Not that it matters, but looking at skin diver, wouldn't there be 4 flood forms, not 1?