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diff --git a/ent_objective.c b/ent_objective.c
new file mode 100644
index 0000000..330e60f
--- /dev/null
+++ b/ent_objective.c
@@ -0,0 +1,120 @@
+#ifndef ENT_OBJECTIVE_C
+#define ENT_OBJECTIVE_C
+
+#include "world.h"
+#include "world_load.h"
+#include "entity.h"
+
+VG_STATIC void ent_objective_pass( world_instance *world, 
+                                   ent_objective *objective ){
+   if( objective->id_next ){
+      world->challenge_timer += objective->filter;
+
+      u32 index = mdl_entity_id_id( objective->id_next );
+      ent_objective *next = mdl_arritm( &world->ent_objective, index );
+      world->challenge_target = next;
+
+      if( next->filter & k_ent_objective_filter_passthrough )
+         ent_objective_pass( world, next );
+      else
+         vg_info( "pass challenge point\n" );
+   }
+   else {
+      vg_success( "NYU Film school graduate SUCKAH\n" );
+      world->challenge_target = NULL;
+      world->challenge_timer = 0.0f;
+
+      if( objective->id_win ){
+         ent_call call;
+         call.data = NULL;
+         call.function = objective->win_event;
+         call.id = objective->id_win;
+         entity_call( world, &call );
+      }
+   }
+}
+
+VG_STATIC int ent_objective_check_filter( ent_objective *objective ){
+   if( objective->filter ){
+      struct player_skate_state *s = &localplayer._skate.state;
+      enum trick_type trick = s->trick_type;
+
+      u32 state = 0x00;
+
+      if( trick == k_trick_type_shuvit ) 
+         state |= k_ent_objective_filter_trick_shuvit;
+      if( trick == k_trick_type_treflip )
+         state |= k_ent_objective_filter_trick_treflip;
+      if( trick == k_trick_type_kickflip )
+         state |= k_ent_objective_filter_trick_kickflip;
+      
+      if( s->flip_rate < -0.0001f ) state |= k_ent_objective_filter_flip_back;
+      if( s->flip_rate >  0.0001f ) state |= k_ent_objective_filter_flip_front;
+
+      if( s->activity == k_skate_activity_grind_5050 ||
+          s->activity == k_skate_activity_grind_back50 ||
+          s->activity == k_skate_activity_grind_front50 ) 
+         state |= k_ent_objective_filter_grind_truck_any;
+
+      if( s->activity == k_skate_activity_grind_boardslide )
+         state |= k_ent_objective_filter_grind_board_any;
+
+      return ((objective->filter  & state) || !objective->filter) && 
+             ((objective->filter2 & state) || !objective->filter2);
+   }
+   else {
+      return 1;
+   }
+}
+
+VG_STATIC void ent_objective_call( world_instance *world, ent_call *call ){
+   u32 index = mdl_entity_id_id( call->id );
+   ent_objective *objective = mdl_arritm( &world->ent_objective, index );
+
+   if( call->function == 0 ){
+      if( objective->flags & k_ent_objective_hidden ) return;
+
+      if( world->challenge_target ){
+         if( (world->challenge_target == objective) && 
+              ent_objective_check_filter( objective )){
+            ent_objective_pass( world, objective );
+         }
+         else {
+            vg_error( "womp womp\n" );
+            world->challenge_target = NULL;
+            world->challenge_timer = 0.0f;
+         }
+      }
+   }
+#if 0
+   else if( call->function == 1 ){
+      if( objective->flags & k_ent_objective_hidden ) return;
+
+      vg_info( "begin the challenge\n" );
+      world->challenge_timer = 0.0f;
+      ent_objective_pass( world, objective );
+   }
+#endif
+   else if( call->function == 2 ){
+      objective->flags &= ~k_ent_objective_hidden;
+
+      if( mdl_entity_id_type( objective->id_next ) == k_ent_objective ){
+         call->id = objective->id_next;
+         entity_call( world, call );
+      }
+   }
+   else if( call->function == 3 ){
+      objective->flags |=  k_ent_objective_hidden;
+
+      if( mdl_entity_id_type( objective->id_next ) == k_ent_objective ){
+         call->id = objective->id_next;
+         entity_call( world, call );
+      }
+   }
+   else {
+      vg_print_backtrace();
+      vg_error( "Unhandled function id: %u\n", call->function );
+   }
+}
+
+#endif /* ENT_OBJECTIVE_C */