So I was digging around the TF2 files, changing strings so things are said differently, etc, when I found some interesting info:
in tf_english.txt:
The following weapons are referenced:
"TF_Weapon_SuperSMG" "Super SMG" (Sniper upgrade?)
"TF_Weapon_Tranq" "Tranquilizer Gun" (Medic upgrade? Replaces syringe gun? Remanent?)
"TF_Weapon_Nailgun" "Nail Gun"(Remanent, or future upgrade?)
From the intro movie to Goldrush
"TF_IM_Goldrush_Intro" "Gold Rush is a Payload map with three stages"
"TF_IM_Goldrush_BlueWin" "Team BLU wins by escorting the cart to RED team's base in stage three before the time runs out"
"TF_IM_Goldrush_RedWin" "Team RED wins by preventing the cart from reaching their final point"
"TF_IM_Goldrush_MoveCart" "The cart moves along the track when BLU players are near it"
"TF_IM_Goldrush_CartHeals" "The cart dispenses health and ammo to the BLU team"
"TF_IM_Goldrush_RollsBack" "If the cart doesn't move for 30 seconds it will start to roll backwards"
"TF_IM_Goldrush_TimeAdd" "Time is added to the clock when the cart reaches each check point"
I'll post any more if I find any more.