diff --git a/include/object_fields.h b/include/object_fields.h
index 23fd63b3..9ec8935d 100644
--- a/include/object_fields.h
+++ b/include/object_fields.h
@@ -125,7 +125,7 @@
 #define /*0x198*/ oNumLootCoins               OBJECT_FIELD_S32(0x44)
 #define /*0x19C*/ oDrawingDistance            OBJECT_FIELD_F32(0x45)
 #define /*0x1A0*/ oRoom                       OBJECT_FIELD_S32(0x46)
-// 0x1A4 is unused, possibly related to 0x1A8 in removed macro purposes.
+#define /*0x1A4*/ oSyncDeath                  OBJECT_FIELD_U32(0x47)
 #define /*0x1A8*/ oUnk1A8                     OBJECT_FIELD_U32(0x48)
 // 0x1AC-0x1B2 (0x48-0x4A) are object specific and defined below the common fields.
 #define /*0x1B4*/ oWallAngle                  OBJECT_FIELD_S32(0x4B)
diff --git a/src/game/behavior_actions.c b/src/game/behavior_actions.c
index b40408b3..7948e249 100644
--- a/src/game/behavior_actions.c
+++ b/src/game/behavior_actions.c
@@ -43,6 +43,7 @@
 #include "spawn_object.h"
 #include "spawn_sound.h"
 #include "thread6.h"
+#include "src/pc/network/network.h"
 
 #define o gCurrentObject
 
diff --git a/src/game/behaviors/bobomb.inc.c b/src/game/behaviors/bobomb.inc.c
index 5c032c9d..2770a336 100644
--- a/src/game/behaviors/bobomb.inc.c
+++ b/src/game/behaviors/bobomb.inc.c
@@ -17,7 +17,7 @@ void bhv_bobomb_init(void) {
     o->oFriction = 0.8;
     o->oBuoyancy = 1.3;
     o->oInteractionSubtype = INT_SUBTYPE_KICKABLE;
-    network_init_object(o);
+    network_init_object(o, 4000);
 }
 
 void bobomb_spawn_coin(void) {
diff --git a/src/game/behaviors/breakable_box.inc.c b/src/game/behaviors/breakable_box.inc.c
index f46954c3..a4f90d34 100644
--- a/src/game/behaviors/breakable_box.inc.c
+++ b/src/game/behaviors/breakable_box.inc.c
@@ -5,7 +5,7 @@ void bhv_breakable_box_loop(void) {
     cur_obj_set_model(MODEL_BREAKABLE_BOX_SMALL);
     if (o->oTimer == 0)
         breakable_box_init();
-    if (cur_obj_was_attacked_or_ground_pounded() != 0) {
+    if (cur_obj_was_attacked_or_ground_pounded() != 0 || o->oSyncDeath) {
         obj_explode_and_spawn_coins(46.0f, 1);
         create_sound_spawner(SOUND_GENERAL_BREAK_BOX);
     }
diff --git a/src/game/behaviors/breakable_box_small.inc.c b/src/game/behaviors/breakable_box_small.inc.c
index 3acf2d56..639c96da 100644
--- a/src/game/behaviors/breakable_box_small.inc.c
+++ b/src/game/behaviors/breakable_box_small.inc.c
@@ -20,6 +20,7 @@ void bhv_breakable_box_small_init(void) {
     obj_set_hitbox(o, &sBreakableBoxSmallHitbox);
     o->oAnimState = 1;
     o->activeFlags |= ACTIVE_FLAG_UNK9;
+    network_init_object(o, 500);
 }
 
 void small_breakable_box_spawn_dust(void) {
diff --git a/src/game/behaviors/goomba.inc.c b/src/game/behaviors/goomba.inc.c
index eb41fda9..5f93f277 100644
--- a/src/game/behaviors/goomba.inc.c
+++ b/src/game/behaviors/goomba.inc.c
@@ -127,7 +127,7 @@ void bhv_goomba_init(void) {
 
     o->oGravity = -8.0f / 3.0f * o->oGoombaScale;
 
-    network_init_object(o);
+    network_init_object(o, 4000);
     network_init_object_field(o, &o->oGoombaTargetYaw);
     network_init_object_field(o, &o->oGoombaWalkTimer);
 }
diff --git a/src/game/behaviors/switch_hidden_objects.inc.c b/src/game/behaviors/switch_hidden_objects.inc.c
index e159700f..ae4a6983 100644
--- a/src/game/behaviors/switch_hidden_objects.inc.c
+++ b/src/game/behaviors/switch_hidden_objects.inc.c
@@ -29,6 +29,8 @@ void breakable_box_init(void) {
             cur_obj_scale(1.5f);
             break;
     }
+    network_init_object(o, SYNC_DISTANCE_ONLY_DEATH);
+    network_init_object_field(o, &o->oInteractStatus);
 }
 
 void hidden_breakable_box_actions(void) {
diff --git a/src/pc/network/network.h b/src/pc/network/network.h
index a9b1e897..55bfd52a 100644
--- a/src/pc/network/network.h
+++ b/src/pc/network/network.h
@@ -6,6 +6,8 @@
 #include <assert.h>
 #include "../cliopts.h"
 
+#define SYNC_DISTANCE_ONLY_DEATH -1
+#define SYNC_DISTANCE_INFINITE 0
 #define MAX_SYNC_OBJECTS 256
 #define MAX_SYNC_OBJECT_FIELDS 16
 #define PACKET_LENGTH 1024
@@ -21,11 +23,14 @@ enum PacketType {
 struct Packet {
     int cursor;
     bool error;
+    bool reliable;
+    u16 seqId;
     char buffer[PACKET_LENGTH];
 };
 
 struct SyncObject {
     struct Object* o;
+    float maxSyncDistance;
     bool owned;
     unsigned int ticksSinceUpdate;
     unsigned int syncDeactive;
@@ -40,7 +45,7 @@ extern enum NetworkType networkType;
 extern struct SyncObject syncObjects[];
 
 void network_init(enum NetworkType networkType);
-void network_init_object(struct Object *object);
+void network_init_object(struct Object *object, float maxSyncDistance);
 void network_send(struct Packet* p);
 void network_update(void);
 void network_shutdown(void);
diff --git a/src/pc/network/packets/packet_object.c b/src/pc/network/packets/packet_object.c
index 517efde5..88f8015e 100644
--- a/src/pc/network/packets/packet_object.c
+++ b/src/pc/network/packets/packet_object.c
@@ -6,16 +6,17 @@
 u32 nextSyncID = 1;
 struct SyncObject syncObjects[MAX_SYNC_OBJECTS] = { 0 };
 
-void network_init_object(struct Object *o) {
+void network_init_object(struct Object *o, float maxSyncDistance) {
     if (o->oSyncID == 0) {
         o->oSyncID = nextSyncID++;
     }
     assert(o->oSyncID < MAX_SYNC_OBJECTS);
     struct SyncObject* so = &syncObjects[o->oSyncID];
     so->o = o;
+    so->maxSyncDistance = maxSyncDistance;
     so->owned = false;
     so->ticksSinceUpdate = -1;
-    so->syncDeactive = 0;
+    so->syncDeactive = false;
     so->extraFieldCount = 0;
     memset(so->extraFields, 0, sizeof(void*) * MAX_SYNC_OBJECT_FIELDS);
 }
@@ -45,7 +46,11 @@ void network_send_object(struct SyncObject* so) {
         packet_write(&p, so->extraFields[i], 4);
     }
 
-    if (o->activeFlags == ACTIVE_FLAG_DEACTIVATED) { so->syncDeactive++; }
+    if (o->activeFlags == ACTIVE_FLAG_DEACTIVATED) {
+        so->syncDeactive = true;
+        p.reliable = true;
+    }
+
     so->ticksSinceUpdate = 0;
     network_send(&p);
 }
@@ -64,6 +69,22 @@ void network_receive_object(struct Packet* p) {
     struct Object* o = syncObjects[syncId].o;
     if (o == NULL) { printf("%s failed to receive object!\n", NETWORKTYPESTR); return; }
 
+    // make sure it's active
+    if (o->activeFlags == ACTIVE_FLAG_DEACTIVATED) {
+        return;
+    }
+
+    // sync only death
+    if (so->maxSyncDistance == SYNC_DISTANCE_ONLY_DEATH) {
+        s16 activeFlags;
+        packet_read(p, &activeFlags, 2);
+        if (activeFlags == ACTIVE_FLAG_DEACTIVATED) {
+            so->o->oSyncDeath = 1;
+            so->syncDeactive = true;
+        }
+        return;
+    }
+
     // write object flags
     packet_read(p, &o->activeFlags, 2);
     packet_read(p, &o->oPosX, 28);
@@ -80,7 +101,6 @@ void network_receive_object(struct Packet* p) {
         packet_read(p, so->extraFields[i], 4);
     }
 
-    if (o->activeFlags == ACTIVE_FLAG_DEACTIVATED) { so->syncDeactive++; }
 }
 
 float player_distance(struct MarioState* marioState, struct Object* o) {
@@ -104,7 +124,7 @@ void forget_sync_object(struct SyncObject* so) {
     so->o = NULL;
     so->owned = false;
     so->ticksSinceUpdate = -1;
-    so->syncDeactive = 0;
+    so->syncDeactive = false;
 }
 
 void network_update_objects(void) {
@@ -113,7 +133,7 @@ void network_update_objects(void) {
         if (so->o == NULL) { continue; }
 
         // check for stale sync object
-        if (so->o->oSyncID != i || so->syncDeactive > 10) {
+        if (so->o->oSyncID != i || so->syncDeactive) {
             forget_sync_object(so);
             continue;
         }
@@ -123,7 +143,15 @@ void network_update_objects(void) {
         if (!should_own_object(so)) { continue; }
 
         // check update rate
-        int updateRate = player_distance(&gMarioStates[0], so->o) / 50;
+        if (so->maxSyncDistance == SYNC_DISTANCE_ONLY_DEATH) {
+            if (so->o->activeFlags != ACTIVE_FLAG_DEACTIVATED) { continue; }
+            network_send_object(&syncObjects[i]);
+            continue;
+        }
+
+        float dist = player_distance(&gMarioStates[0], so->o);
+        if (so->maxSyncDistance != SYNC_DISTANCE_INFINITE && dist > so->maxSyncDistance) { continue; }
+        int updateRate = dist / 50;
         if (gMarioStates[0].heldObj == so->o) { updateRate = 0; }
         if (so->ticksSinceUpdate < updateRate) { continue; }