diff --git a/main.cpp b/main.cpp
index 93c0f16..70a10cf 100644
--- a/main.cpp
+++ b/main.cpp
@@ -8,6 +8,7 @@
 #include "render.hpp"
 #include "save.hpp"
 #include "lights.hpp"
+#include "worldbuilder.hpp"
 #include "ftxui/screen/terminal.hpp"  // for SetColorSupport, Color, TrueColor
 #include <filesystem>
 #include <fcntl.h>
@@ -81,7 +82,8 @@ int main(int argc, char *argv[]) {
     fs::path save_path{argv[1]};
     save::from_file(save_path, world, game_map);
   } else {
-    game_map.generate();
+    WorldBuilder builder(game_map);
+    builder.generate();
     configure_world(world, game_map);
   }
 
diff --git a/map.cpp b/map.cpp
index 08b04fb..5a34da2 100644
--- a/map.cpp
+++ b/map.cpp
@@ -3,7 +3,6 @@
 #include <vector>
 #include <array>
 #include <fmt/core.h>
-#include "rand.hpp"
 #include <utility>
 
 using std::vector, std::pair;
@@ -19,11 +18,6 @@ void dump_map(const std::string &msg, Matrix &map) {
   }
 }
 
-/**
- * This will create an _inverted_ map that you
- * can run make_rooms and generate on. It will
- * NOT be valid until you actually run generate.
- */
 Map::Map(size_t width, size_t height) :
   $limit(1000),
   $width(width),
@@ -36,72 +30,54 @@ void Map::make_paths() {
   $paths.compute_paths($walls);
 }
 
-void Map::make_room(size_t origin_x, size_t origin_y, size_t w, size_t h) {
-  INVARIANT();
-  dbc::pre("y out of bounds", origin_y + h < $height);
-  dbc::pre("x out of bounds", origin_x + w < $width);
-
-  for(size_t y = origin_y; y < origin_y + h; ++y) {
-    for(size_t x = origin_x; x < origin_x + w; ++x) {
-      $walls[y][x] = INV_SPACE;
-    }
-  }
+bool Map::inmap(size_t x, size_t y) {
+  return x < $width && y < $height;
 }
 
-inline int make_split(Room &cur, bool horiz) {
-  size_t dimension = horiz ? cur.height : cur.width;
-  int min = dimension / 4;
-  int max = dimension - min;
 
-  return Random::uniform<int>(min, max);
+void Map::set_target(const Point &at, int value) {
+  $paths.set_target(at, value);
 }
 
-void Map::partition_map(Room &cur, int depth) {
-  if(cur.width >= 5 && cur.width <= 10 &&
-      cur.height >= 5 && cur.height <= 10) {
-    $rooms.push_back(cur);
-    return;
-  }
+void Map::clear_target(const Point &at) {
+  $paths.clear_target(at);
+}
 
-  bool horiz = cur.width > cur.height ? false : true;
-  int split = make_split(cur, horiz);
-  Room left = cur;
-  Room right = cur;
+Point Map::place_entity(size_t room_index) {
+  dbc::check(room_index < $rooms.size(), "room_index is out of bounds, not enough rooms");
 
-  if(horiz) {
-    dbc::check(split > 0, "split is not > 0");
-    dbc::check(split < int(cur.height), "split is too big!");
-    left.height = size_t(split - 1);
-    right.y = cur.y + split;
-    right.height = size_t(cur.height - split);
-  } else {
-    dbc::check(split > 0, "split is not > 0");
-    dbc::check(split < int(cur.width), "split is too big!");
+  Room &start = $rooms[room_index];
+  return {start.x+1, start.y+1};
+}
 
-    left.width = size_t(split-1);
-    right.x = cur.x + split,
-    right.width = size_t(cur.width - split);
-  }
+bool Map::iswall(size_t x, size_t y) {
+  return $walls[y][x] == WALL_VALUE;
+}
 
-  if(depth > 0  && left.width > 5 && left.height > 5) {
-    partition_map(left, depth-1);
-  }
+void Map::dump() {
+  dump_map("WALLS", $walls);
+}
 
-  if(depth > 0 && right.width > 5 && right.height > 5) {
-    partition_map(right, depth-1);
-  }
+bool Map::can_move(Point move_to) {
+  return inmap(move_to.x, move_to.y) &&
+    !iswall(move_to.x, move_to.y);
 }
 
-void Map::place_rooms(Room &cur) {
-  for(auto &cur : $rooms) {
-    cur.x += 2;
-    cur.y += 2;
-    cur.width -= 4;
-    cur.height -= 4;
-    add_door(cur);
-    set_door(cur, INV_SPACE);
-    make_room(cur.x, cur.y, cur.width, cur.height);
-  }
+Point Map::map_to_camera(const Point &loc, const Point &cam_orig) {
+  return {loc.x - cam_orig.x, loc.y - cam_orig.y};
+}
+
+Point Map::center_camera(const Point &around, size_t view_x, size_t view_y) {
+  int high_x = int(width() - view_x);
+  int high_y = int(height() - view_y);
+  int center_x = int(around.x - view_x / 2);
+  int center_y = int(around.y - view_y / 2);
+
+  // BUG: is clamp really the best thing here? this seems wrong.
+  size_t start_x = high_x > 0 ? std::clamp(center_x, 0, high_x) : 0;
+  size_t start_y = high_y > 0 ? std::clamp(center_y, 0, high_y) : 0;
+
+  return {start_x, start_y};
 }
 
 bool Map::neighbors(Point &out, bool greater) {
@@ -142,159 +118,6 @@ bool Map::neighbors(Point &out, bool greater) {
   }
 }
 
-bool Map::inmap(size_t x, size_t y) {
-  return x < $width && y < $height;
-}
-
-void Map::set_door(Room &room, int value) {
-  $walls[room.entry.y][room.entry.x] = value;
-  $walls[room.exit.y][room.exit.x] = value;
-}
-
-void rand_side(Room &room, Point &door) {
-  int rand_x = Random::uniform<int>(0, room.width - 1);
-  int rand_y = Random::uniform<int>(0, room.height - 1);
-
-  switch(Random::uniform<int>(0,3)) {
-    case 0: // north
-      door.x = room.x + rand_x;
-      door.y = room.y-1;
-      break;
-    case 1: // south
-      door.x = room.x + rand_x;
-      door.y = room.y + room.height;
-      break;
-    case 2: // east
-      door.x = room.x + room.width;
-      door.y = room.y + rand_y;
-      break;
-    case 3: // west
-      door.x = room.x - 1;
-      door.y = room.y + rand_y;
-      break;
-    default:
-      dbc::sentinel("impossible side");
-  }
-}
-
-void Map::add_door(Room &room) {
-  rand_side(room, room.entry);
-  rand_side(room, room.exit);
-}
-
-bool Map::walk(Point &src, Point &target) {
-  Matrix &paths = $paths.$paths;
-  // this sets the target for the path
-  dbc::check($paths.$input[target.y][target.x] == 0, "target point not set to 0");
-
-  $walls[src.y][src.x] = INV_WALL;
-  $walls[target.y][target.x] = INV_WALL;
-
-  // for the walk this needs to be walls since it's inverted?
-  dbc::check($walls[src.y][src.x] == INV_WALL,
-      "src room has a wall at exit door");
-  dbc::check($walls[target.y][target.x] == INV_WALL,
-      "target room has a wall at entry door");
-
-  make_paths();
-  bool found = false;
-  Point out{src.x, src.y};
-  int count = 0;
-
-  do {
-    $walls[out.y][out.x] = INV_SPACE;
-    found = neighbors(out, true);
-
-    if(paths[out.y][out.x] == 0) {
-      $walls[out.y][out.x] = INV_SPACE;
-      return true;
-    }
-  } while(found && out.x > 0 && out.y > 0 && ++count < 100);
-
-  return false;
-}
-
-void Map::set_target(const Point &at, int value) {
-  $paths.set_target(at, value);
-}
-
-void Map::clear_target(const Point &at) {
-  $paths.clear_target(at);
-}
-
-Point Map::place_entity(size_t room_index) {
-  dbc::check(room_index < $rooms.size(), "room_index is out of bounds, not enough rooms");
-
-  Room &start = $rooms[room_index];
-  return {start.x+1, start.y+1};
-}
-
-void Map::generate() {
-  Room root{
-    .x = 0,
-    .y = 0,
-    .width = $width,
-    .height = $height
-  };
-
-  partition_map(root, 10);
-  place_rooms(root);
-
-  for(size_t i = 0; i < $rooms.size() - 1; i++) {
-    Room &src = $rooms[i];
-    Room &target = $rooms[i+1];
-    set_target(target.entry);
-    bool found = walk(src.exit, target.entry);
-    if(!found) {
-      println("ROOM NOT FOUND!");
-    }
-    clear_target(target.entry);
-  }
-
-  Room &src = $rooms.back();
-  Room &target = $rooms.front();
-
-  set_target(target.entry);
-  walk(src.exit, target.entry);
-  clear_target(target.entry);
-
-  for(size_t y = 0; y < $height; ++y) {
-    for(size_t x = 0; x < $width; ++x) {
-      $walls[y][x] = !$walls[y][x];
-    }
-  }
-}
-
-bool Map::iswall(size_t x, size_t y) {
-  return $walls[y][x] == WALL_VALUE;
-}
-
-void Map::dump() {
-  dump_map("WALLS", $walls);
-}
-
-bool Map::can_move(Point move_to) {
-  return inmap(move_to.x, move_to.y) &&
-    !iswall(move_to.x, move_to.y);
-}
-
-Point Map::map_to_camera(const Point &loc, const Point &cam_orig) {
-  return {loc.x - cam_orig.x, loc.y - cam_orig.y};
-}
-
-Point Map::center_camera(const Point &around, size_t view_x, size_t view_y) {
-  int high_x = int(width() - view_x);
-  int high_y = int(height() - view_y);
-  int center_x = int(around.x - view_x / 2);
-  int center_y = int(around.y - view_y / 2);
-
-  // BUG: is clamp really the best thing here? this seems wrong.
-  size_t start_x = high_x > 0 ? std::clamp(center_x, 0, high_x) : 0;
-  size_t start_y = high_y > 0 ? std::clamp(center_y, 0, high_y) : 0;
-
-  return {start_x, start_y};
-}
-
 
 bool Map::INVARIANT() {
   using dbc::check;
diff --git a/map.hpp b/map.hpp
index 27b3ad1..9ede0b4 100644
--- a/map.hpp
+++ b/map.hpp
@@ -56,23 +56,15 @@ public:
   Room &room(size_t at) { return $rooms[at]; }
   size_t room_count() { return $rooms.size(); }
 
-  void partition_map(Room &cur, int depth);
-  void make_room(size_t origin_y, size_t origin_x, size_t width, size_t height);
-  void add_door(Room &room);
-  bool can_move(Point move_to);
-  void generate();
-  void set_door(Room &room, int value);
-  void place_rooms(Room &root);
-
   Point place_entity(size_t room_index);
-  bool neighbors(Point &out, bool up);
   bool inmap(size_t x, size_t y);
   bool iswall(size_t x, size_t y);
+  bool can_move(Point move_to);
+  bool neighbors(Point &out, bool up);
 
   void make_paths();
   void set_target(const Point &at, int value=0);
   void clear_target(const Point &at);
-  bool walk(Point &src, Point &target);
 
   Point map_to_camera(const Point &loc, const Point &cam_orig);
   Point center_camera(const Point &around, size_t view_x, size_t view_y);
diff --git a/meson.build b/meson.build
index 345cbbb..194c589 100644
--- a/meson.build
+++ b/meson.build
@@ -32,6 +32,7 @@ runtests = executable('runtests', [
   'render.cpp',
   'pathing.cpp',
   'lights.cpp',
+  'worldbuilder.cpp',
   'tests/fsm.cpp',
   'tests/dbc.cpp',
   'tests/map.cpp',
@@ -45,6 +46,7 @@ runtests = executable('runtests', [
   'tests/panel.cpp',
   'tests/sound.cpp',
   'tests/pathing.cpp',
+  'tests/worldbuilder.cpp',
   ],
   dependencies: dependencies)
 
@@ -65,6 +67,7 @@ roguish = executable('roguish', [
   'panel.cpp',
   'pathing.cpp',
   'lights.cpp',
+  'worldbuilder.cpp',
   ],
   dependencies: dependencies)
 
diff --git a/tests/map.cpp b/tests/map.cpp
index d84da0b..cee1e23 100644
--- a/tests/map.cpp
+++ b/tests/map.cpp
@@ -1,8 +1,8 @@
 #include <catch2/catch_test_macros.hpp>
-#include "map.hpp"
 #include <fmt/core.h>
 #include <nlohmann/json.hpp>
 #include <fstream>
+#include "map.hpp"
 
 using namespace fmt;
 using namespace nlohmann;
@@ -40,39 +40,3 @@ TEST_CASE("dijkstra algo test", "[map]") {
     // FIX ME: REQUIRE(paths == expected);
   }
 }
-
-TEST_CASE("bsp algo test", "[map]") {
-  Map map(20, 20);
-  map.generate();
-}
-
-TEST_CASE("dumping and debugging", "[map]") {
-  Map map(20, 20);
-  map.generate();
-
-  dump_map("GENERATED", map.paths());
-  map.dump();
-}
-
-
-TEST_CASE("camera control", "[map]") {
-  Map map(20,20);
-  map.generate();
-
-  Point center = map.center_camera({10,10}, 5, 5);
-
-  REQUIRE(center.x == 8);
-  REQUIRE(center.y == 8);
-
-  Point translation = map.map_to_camera({10,10}, center);
-
-  REQUIRE(translation.x == 2);
-  REQUIRE(translation.y == 2);
-}
-
-TEST_CASE("pathing", "[map]") {
-  Map map(20,20);
-  map.generate();
-  REQUIRE(map.can_move({0,0}) == false);
-  REQUIRE(map.iswall(0,0) == true);
-}
diff --git a/tests/worldbuilder.cpp b/tests/worldbuilder.cpp
new file mode 100644
index 0000000..83c5a98
--- /dev/null
+++ b/tests/worldbuilder.cpp
@@ -0,0 +1,51 @@
+#include <catch2/catch_test_macros.hpp>
+#include <fmt/core.h>
+#include <nlohmann/json.hpp>
+#include <fstream>
+#include "map.hpp"
+#include "worldbuilder.hpp"
+
+using namespace fmt;
+using namespace nlohmann;
+using std::string;
+
+TEST_CASE("bsp algo test", "[map]") {
+  Map map(20, 20);
+  WorldBuilder builder(map);
+  builder.generate();
+}
+
+TEST_CASE("dumping and debugging", "[map]") {
+  Map map(20, 20);
+  WorldBuilder builder(map);
+  builder.generate();
+
+  dump_map("GENERATED", map.paths());
+  map.dump();
+}
+
+
+TEST_CASE("camera control", "[map]") {
+  Map map(20, 20);
+  WorldBuilder builder(map);
+  builder.generate();
+
+  Point center = map.center_camera({10,10}, 5, 5);
+
+  REQUIRE(center.x == 8);
+  REQUIRE(center.y == 8);
+
+  Point translation = map.map_to_camera({10,10}, center);
+
+  REQUIRE(translation.x == 2);
+  REQUIRE(translation.y == 2);
+}
+
+TEST_CASE("pathing", "[map]") {
+  Map map(20, 20);
+  WorldBuilder builder(map);
+  builder.generate();
+
+  REQUIRE(map.can_move({0,0}) == false);
+  REQUIRE(map.iswall(0,0) == true);
+}
diff --git a/worldbuilder.cpp b/worldbuilder.cpp
new file mode 100644
index 0000000..d87dd27
--- /dev/null
+++ b/worldbuilder.cpp
@@ -0,0 +1,177 @@
+#include "worldbuilder.hpp"
+#include "rand.hpp"
+#include <fmt/core.h>
+
+using namespace fmt;
+
+inline int make_split(Room &cur, bool horiz) {
+  size_t dimension = horiz ? cur.height : cur.width;
+  int min = dimension / 4;
+  int max = dimension - min;
+
+  return Random::uniform<int>(min, max);
+}
+
+void WorldBuilder::set_door(Room &room, int value) {
+  $map.$walls[room.entry.y][room.entry.x] = value;
+  $map.$walls[room.exit.y][room.exit.x] = value;
+}
+
+void rand_side(Room &room, Point &door) {
+  int rand_x = Random::uniform<int>(0, room.width - 1);
+  int rand_y = Random::uniform<int>(0, room.height - 1);
+
+  switch(Random::uniform<int>(0,3)) {
+    case 0: // north
+      door.x = room.x + rand_x;
+      door.y = room.y-1;
+      break;
+    case 1: // south
+      door.x = room.x + rand_x;
+      door.y = room.y + room.height;
+      break;
+    case 2: // east
+      door.x = room.x + room.width;
+      door.y = room.y + rand_y;
+      break;
+    case 3: // west
+      door.x = room.x - 1;
+      door.y = room.y + rand_y;
+      break;
+    default:
+      dbc::sentinel("impossible side");
+  }
+}
+
+void WorldBuilder::add_door(Room &room) {
+  rand_side(room, room.entry);
+  rand_side(room, room.exit);
+}
+
+void WorldBuilder::partition_map(Room &cur, int depth) {
+  if(cur.width >= 5 && cur.width <= 10 &&
+      cur.height >= 5 && cur.height <= 10) {
+    $map.$rooms.push_back(cur);
+    return;
+  }
+
+  bool horiz = cur.width > cur.height ? false : true;
+  int split = make_split(cur, horiz);
+  Room left = cur;
+  Room right = cur;
+
+  if(horiz) {
+    dbc::check(split > 0, "split is not > 0");
+    dbc::check(split < int(cur.height), "split is too big!");
+    left.height = size_t(split - 1);
+    right.y = cur.y + split;
+    right.height = size_t(cur.height - split);
+  } else {
+    dbc::check(split > 0, "split is not > 0");
+    dbc::check(split < int(cur.width), "split is too big!");
+
+    left.width = size_t(split-1);
+    right.x = cur.x + split,
+    right.width = size_t(cur.width - split);
+  }
+
+  if(depth > 0  && left.width > 5 && left.height > 5) {
+    partition_map(left, depth-1);
+  }
+
+  if(depth > 0 && right.width > 5 && right.height > 5) {
+    partition_map(right, depth-1);
+  }
+}
+
+void WorldBuilder::generate() {
+  Room root{
+    .x = 0,
+    .y = 0,
+    .width = $map.$width,
+    .height = $map.$height
+  };
+
+  partition_map(root, 10);
+  place_rooms(root);
+
+  for(size_t i = 0; i < $map.$rooms.size() - 1; i++) {
+    Room &src = $map.$rooms[i];
+    Room &target = $map.$rooms[i+1];
+    $map.set_target(target.entry);
+    bool found = dig_tunnel(src.exit, target.entry);
+    if(!found) {
+      println("ROOM NOT FOUND!");
+    }
+    $map.clear_target(target.entry);
+  }
+
+  Room &src = $map.$rooms.back();
+  Room &target = $map.$rooms.front();
+
+  $map.set_target(target.entry);
+  dig_tunnel(src.exit, target.entry);
+  $map.clear_target(target.entry);
+
+  for(size_t y = 0; y < $map.$height; ++y) {
+    for(size_t x = 0; x < $map.$width; ++x) {
+      $map.$walls[y][x] = !$map.$walls[y][x];
+    }
+  }
+}
+
+void WorldBuilder::make_room(size_t origin_x, size_t origin_y, size_t w, size_t h) {
+  $map.INVARIANT();
+  dbc::pre("y out of bounds", origin_y + h < $map.$height);
+  dbc::pre("x out of bounds", origin_x + w < $map.$width);
+
+  for(size_t y = origin_y; y < origin_y + h; ++y) {
+    for(size_t x = origin_x; x < origin_x + w; ++x) {
+      $map.$walls[y][x] = INV_SPACE;
+    }
+  }
+}
+
+
+void WorldBuilder::place_rooms(Room &cur) {
+  for(auto &cur : $map.$rooms) {
+    cur.x += 2;
+    cur.y += 2;
+    cur.width -= 4;
+    cur.height -= 4;
+    add_door(cur);
+    set_door(cur, INV_SPACE);
+    make_room(cur.x, cur.y, cur.width, cur.height);
+  }
+}
+
+bool WorldBuilder::dig_tunnel(Point &src, Point &target) {
+  Matrix &paths = $map.paths();
+  Matrix &walls = $map.walls();
+
+  walls[src.y][src.x] = INV_WALL;
+  walls[target.y][target.x] = INV_WALL;
+
+  // for the walk this needs to be walls since it's inverted?
+  dbc::check(walls[src.y][src.x] == INV_WALL,
+      "src room has a wall at exit door");
+  dbc::check(walls[target.y][target.x] == INV_WALL,
+      "target room has a wall at entry door");
+
+  $map.make_paths();
+  bool found = false;
+  Point out{src.x, src.y};
+  int count = 0;
+
+  do {
+    walls[out.y][out.x] = INV_SPACE;
+    found = $map.neighbors(out, true);
+
+    if(paths[out.y][out.x] == 0) {
+      walls[out.y][out.x] = INV_SPACE;
+      return true;
+    }
+  } while(found && out.x > 0 && out.y > 0 && ++count < 100);
+
+  return false;
+}
diff --git a/worldbuilder.hpp b/worldbuilder.hpp
new file mode 100644
index 0000000..fd56b62
--- /dev/null
+++ b/worldbuilder.hpp
@@ -0,0 +1,18 @@
+#pragma once
+
+#include "map.hpp"
+
+class WorldBuilder {
+  public:
+  Map& $map;
+
+  WorldBuilder(Map &map) : $map(map) { }
+
+  void partition_map(Room &cur, int depth);
+  void make_room(size_t origin_y, size_t origin_x, size_t width, size_t height);
+  void add_door(Room &room);
+  void generate();
+  void set_door(Room &room, int value);
+  void place_rooms(Room &root);
+  bool dig_tunnel(Point &src, Point &target);
+};