diff --git a/src/Lobby.cc b/src/Lobby.cc
index 39318ef4..8ff904d9 100644
--- a/src/Lobby.cc
+++ b/src/Lobby.cc
@@ -9,6 +9,7 @@
 #include "SendCommands.hh"
 #include "ServerState.hh"
 #include "Text.hh"
+#include "BrutalPeeps.hh"
 
 bool Lobby::FloorItem::visible_to_client(uint8_t client_id) const {
   return this->flags & (1 << client_id);
@@ -229,9 +230,13 @@ void Lobby::create_item_creator(Version logic_version) {
       rand_crypt,
       this->quest ? this->quest->meta.battle_rules : nullptr);
   if (this->brutal_peeps_tier >= 0) {
-    double rare_mult = 1.25 + (static_cast<double>(this->brutal_peeps_tier) * 0.25);
-    this->item_creator->set_rare_drop_rate_multiplier(rare_mult);
-    this->log.info_f("Brutal Peeps +{} rare drop rate multiplier set to {:g}x", this->brutal_peeps_tier, rare_mult);
+    const auto* brutal_peeps_def = brutal_peeps_tier_definition(this->brutal_peeps_tier);
+    if (brutal_peeps_def) {
+      this->item_creator->set_rare_drop_rate_multiplier(brutal_peeps_def->rare_drop_multiplier);
+      this->log.info_f("Brutal Peeps +{} rare drop rate multiplier set to {:g}x",
+          this->brutal_peeps_tier,
+          brutal_peeps_def->rare_drop_multiplier);
+    }
   }
   if (s->use_legacy_item_random_behavior) {
     this->item_creator->set_legacy_replay();
diff --git a/src/ReceiveCommands.cc b/src/ReceiveCommands.cc
index a432ddef..ce68c5a0 100644
--- a/src/ReceiveCommands.cc
+++ b/src/ReceiveCommands.cc
@@ -5190,13 +5190,15 @@ std::shared_ptr<Lobby> create_game_generic(
   }
   game->base_exp_multiplier = s->bb_global_exp_multiplier;
   if (game->brutal_peeps_tier >= 0) {
-    float brutal_peeps_exp_multiplier = 1.0f + (static_cast<float>(game->brutal_peeps_tier) * 0.25f);
-    game->base_exp_multiplier *= brutal_peeps_exp_multiplier;
-    game->log.info_f("Brutal Peeps +{} EXP multiplier set to {:g}x total (BBGlobalEXPMultiplier={:g}, brutal_peeps={:g})",
-        static_cast<int>(game->brutal_peeps_tier),
-        game->base_exp_multiplier,
-        s->bb_global_exp_multiplier,
-        brutal_peeps_exp_multiplier);
+    const auto* brutal_peeps_def = brutal_peeps_tier_definition(game->brutal_peeps_tier);
+    if (brutal_peeps_def) {
+      game->base_exp_multiplier *= brutal_peeps_def->exp_multiplier;
+      game->log.info_f("Brutal Peeps +{} EXP multiplier set to {:g}x total (BBGlobalEXPMultiplier={:g}, brutal_peeps={:g})",
+          static_cast<int>(game->brutal_peeps_tier),
+          game->base_exp_multiplier,
+          s->bb_global_exp_multiplier,
+          brutal_peeps_def->exp_multiplier);
+    }
   }
   game->exp_share_multiplier = s->exp_share_multiplier;
 
diff --git a/src/SendCommands.cc b/src/SendCommands.cc
index 46dffd95..a45443ee 100644
--- a/src/SendCommands.cc
+++ b/src/SendCommands.cc
@@ -21,6 +21,7 @@
 #include "ReceiveSubcommands.hh"
 #include "StaticGameData.hh"
 #include "Text.hh"
+#include "BrutalPeeps.hh"
 
 extern const char* QUEST_BARRIER_DISCONNECT_HOOK_NAME;
 
@@ -711,20 +712,19 @@ static bool is_battle_param_stream_file_for_brutal_peeps(const std::string& file
 static std::string bb_stream_file_data_for_client(std::shared_ptr<Client> c) {
   auto s = c->require_server_state();
 
-  int64_t effective_brutal_peeps_hp_scale_tier = (c->selected_brutal_peeps_tier >= 0)
-      ? c->selected_brutal_peeps_tier
-      : s->brutal_peeps_enemy_hp_scale_tier;
+  int64_t effective_brutal_peeps_hp_scale_tier = c->selected_brutal_peeps_tier;
+  auto l = c->lobby.lock();
+  if ((effective_brutal_peeps_hp_scale_tier < 0) && l && (l->brutal_peeps_tier >= 0)) {
+    effective_brutal_peeps_hp_scale_tier = l->brutal_peeps_tier;
+  }
 
-  if (effective_brutal_peeps_hp_scale_tier < 0) {
+  const auto* brutal_peeps_def = brutal_peeps_tier_definition(effective_brutal_peeps_hp_scale_tier);
+  if (!brutal_peeps_def) {
     return s->bb_stream_file->data;
   }
 
-  effective_brutal_peeps_hp_scale_tier = std::min<int64_t>(
-      s->brutal_peeps_max_tier,
-      effective_brutal_peeps_hp_scale_tier);
-
   std::string scaled_data = s->bb_stream_file->data;
-  double mult = 1.0 + (static_cast<double>(effective_brutal_peeps_hp_scale_tier) * 0.25);
+  double mult = brutal_peeps_def->enemy_hp_multiplier;
   size_t ultimate_index = static_cast<size_t>(Difficulty::ULTIMATE);
 
   auto scale_u16 = [mult](uint32_t v) -> uint16_t {