Sorry for the bump, but the solution was still missing.
Well.... I can't find target_human_win? Its not with the targets. Do you have to have something speical to be able to have it?
I use GTKradiant 1.5 which is also missing this entity type, but you can make a target_speaker (or anything else like this) and manually change the classname to "target_human_win" or "target_alien_win". GTKradiant will of course not offer a description, but you can add key "targetname", target it with something, and it will work like a charm.
While we're at it: I tried "target_score", and the activating player actually received kills! But this did not trigger the next stage, so it's basically useless.
Another thing I found out via decompiling ATCS: If you put a player_start (which is useless for Tremulous), that's where your camera will be in GTKradiant when you load the map. An easy way to quickly get where you're currently working on.
And here's the list of triggers etc. that I found in the "game.qvm" itself (is in "vms-1.1.t971.pk3", I use the ancient TJW backport). I marked the ones that are not in GTKradiant with an arrow.
misc_light_flare
misc_anim_model
misc_particle_system
misc_portal_camera
misc_portal_surface
misc_model
misc_teleporter_dest
path_corner
target_hurt <============
target_human_win <============
target_alien_win <============
target_rumble
target_push
target_location
target_position
target_kill
target_relay
target_teleporter
target_score
target_print
target_speaker
target_delay
trigger_ammo
trigger_heal
trigger_gravity
trigger_equipment
trigger_class
trigger_buildable
trigger_win
trigger_stage
trigger_hurt
trigger_teleport
trigger_push
trigger_multiple
trigger_always
func_timer
func_group
func_train
func_pendulum
func_bobbing
func_rotating
func_static
func_door_model
func_door_rotating
func_door
func_button
func_plat
info_notnull
info_null
info_human_intermission
info_alien_intermission
info_player_intermission
info_player_deathmatch <============
info_player_start
