diff --git a/Makefile b/Makefile
index 0b8e929aac2d9245f0a0ff871cf8cc0d9a2390af..7473ff4c5895e72857556af202b99ff91cefdf4d 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ SYSTEM     := $(shell uname -s)
 
 SOURCES    := main.c ppm.c keyboard.c mouse.c
 
-GAME       := bin/game
+GAME       := bin/pathfinder
 HEXDUMP    := bin/hexdump
 PACKER     := bin/packer
 
diff --git a/README.md b/README.md
index 351c10247498796c3e031e64ca27bd52fe66f211..78bafb98bbbf29982b726f01f705072a68e2f8ee 100644
--- a/README.md
+++ b/README.md
@@ -7,8 +7,20 @@
 ## Aseprite PPM exporter
 
 ```sh
+# Start from root of the project.
 mkdir -p ~/.config/aseprite/scripts
-ln -s extern/ppm.lua ~/.config/aseprite/scripts/
+ln -s $PWD/extern/ppm.lua ~/.config/aseprite/scripts/
 ```
 
 This script can be keybind in Aseprite.
+
+## Trenchbroom integration
+
+```sh
+# Start from root of the project.
+ln -s $PWD/extern/trenchbroom/ ~/.TrenchBroom/games/pathfinder
+```
+
+- Check that `path` in `GameEngineProfiles.cfg` points to game executable.
+- Open Trenchbroom and go to `View>Preferences` and check that `Game Path`
+  points to project root.
diff --git a/extern/trenchbroom/Entities.fgd b/extern/trenchbroom/Entities.fgd
new file mode 100644
index 0000000000000000000000000000000000000000..a9191ffd73cd7fa65334e0a4f47eafd8a2e00d03
--- /dev/null
+++ b/extern/trenchbroom/Entities.fgd
@@ -0,0 +1,25 @@
+@BaseClass = Targetname
+[
+  targetname(string) : "Name"
+]
+
+@BaseClass = Origin
+[
+  origin(string) : "Origin"
+]
+
+@SolidClass = worldspawn : "Worldspawn"
+[
+  message(string) : "Map title"
+]
+
+@PointClass base(Targetname, Origin) size(-16 -16 -16, 16 16 16) = player_start : "Player Start"
+[
+  angle(integer) : "Angle" : 0
+]
+
+@PointClass base(Targetname, Origin) size(-8 -8 -8, 8 8 8) = light : "Light"
+[
+  luminosity(integer) : "Luminosity" : 300
+  range(integer) : "Range" : 500
+]
diff --git a/extern/trenchbroom/GameConfig.cfg b/extern/trenchbroom/GameConfig.cfg
new file mode 100644
index 0000000000000000000000000000000000000000..c8f8e0c60a740c9c380e379bf38c3803a94a0c6b
--- /dev/null
+++ b/extern/trenchbroom/GameConfig.cfg
@@ -0,0 +1,26 @@
+{
+  "version": 9,
+  "name": "Pathfinder",
+  "icon": "icon.png",
+
+  "fileformats": [
+    { "format": "Standard" }
+  ],
+
+  "filesystem": {
+    "searchpath": ".",
+    "packageformat": { "extension": ".pak", "format": "idpak" }
+  },
+
+  "materials": {
+    "root": "textures",
+    "extensions": [ ".png", ".jpg", ".tga", ".ppm" ]
+  },
+
+  "entities": {
+    "definitions": [ "Entities.fgd" ],
+    "defaultcolor": "0.6 0.6 0.6 1.0"
+  },
+
+  "softMapBounds": "-4096 -4096 -4096 4096 4096 4096"
+}
diff --git a/extern/trenchbroom/GameEngineProfiles.cfg b/extern/trenchbroom/GameEngineProfiles.cfg
new file mode 100644
index 0000000000000000000000000000000000000000..7642d871849df0d1ac04558b955b47e941629630
--- /dev/null
+++ b/extern/trenchbroom/GameEngineProfiles.cfg
@@ -0,0 +1,10 @@
+{
+  "profiles": [
+    {
+      "name": "Pathfinder",
+      "parameters": "--fps 120 --width 1920 --height 1080 --map maps/${MAP_BASE_NAME}.map",
+      "path": "/home/m/Projects/pathfinder/tools/tbrun.sh"
+    }
+  ],
+  "version": 1
+}
diff --git a/extern/trenchbroom/icon.png b/extern/trenchbroom/icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..3bf9ef64df136ed6faab099db9d1c1a9f32a3a16
Binary files /dev/null and b/extern/trenchbroom/icon.png differ
diff --git a/maps/sandbox.map b/maps/sandbox.map
new file mode 100644
index 0000000000000000000000000000000000000000..b7593d43083c2d5d0e37090ed3f3a997f1968e39
--- /dev/null
+++ b/maps/sandbox.map
@@ -0,0 +1,20 @@
+// Game: Pathfinder
+// Format: Standard
+// entity 0
+{
+"classname" "worldspawn"
+// brush 0
+{
+( -64 -64 -16 ) ( -64 -63 -16 ) ( -64 -64 -15 ) __TB_empty 0 0 0 1 1
+( -64 -64 -16 ) ( -64 -64 -15 ) ( -63 -64 -16 ) __TB_empty 0 0 0 1 1
+( -64 -64 -16 ) ( -63 -64 -16 ) ( -64 -63 -16 ) __TB_empty 0 0 0 1 1
+( 64 64 16 ) ( 64 65 16 ) ( 65 64 16 ) __TB_empty 0 0 0 1 1
+( 64 64 16 ) ( 65 64 16 ) ( 64 64 17 ) __TB_empty 0 0 0 1 1
+( 64 64 16 ) ( 64 64 17 ) ( 64 65 16 ) __TB_empty 0 0 0 1 1
+}
+}
+// entity 1
+{
+"classname" "player_start"
+"origin" "0 0 32"
+}
diff --git a/tools/tbrun.sh b/tools/tbrun.sh
new file mode 100755
index 0000000000000000000000000000000000000000..36da58e7b85e8eb702afd5629d8f6f18582f9d14
--- /dev/null
+++ b/tools/tbrun.sh
@@ -0,0 +1,66 @@
+#!/bin/sh
+
+SCRIPT="$0"
+case "$SCRIPT" in
+	/*) ;;
+	*) SCRIPT="$(pwd)/$SCRIPT" ;;
+esac
+
+# resolve symlinks
+while [ -L "$SCRIPT" ]; do
+	LINK="$(readlink "$SCRIPT")"
+	case "$LINK" in
+		/*) SCRIPT="$LINK" ;;
+		*) SCRIPT="$(dirname "$SCRIPT")/$LINK" ;;
+	esac
+done
+
+SCRIPT_DIR="$(cd "$(dirname "$SCRIPT")" && pwd -P)"
+echo "$SCRIPT_DIR"
+
+MAP=""
+FPS=""
+WIDTH=""
+HEIGHT=""
+while [ $# -gt 0 ]; do
+	case "$1" in
+		--map)
+			shift
+			MAP="$1"
+			;;
+		--map=*)
+			MAP="${1#--map=}"
+			;;
+		--fps)
+			shift
+			FPS="$1"
+			;;
+		--fps=*)
+			FPS="${1#--fps=}"
+			;;
+		--width)
+			shift
+			WIDTH="$1"
+			;;
+		--width=*)
+			WIDTH="${1#--width=}"
+			;;
+		--height)
+			shift
+			HEIGHT="$1"
+			;;
+		--height=*)
+			HEIGHT="${1#--height=}"
+			;;
+		--) shift; break;;
+		*) ;;
+	esac
+	shift
+done
+
+cd "$SCRIPT_DIR"
+cd ..
+DEBUG=1 ./bin/pathfinder --map "$MAP" \
+	${FPS:+--fps "$FPS"} \
+	${WIDTH:+--width "$WIDTH"} \
+	${HEIGHT:+--height "$HEIGHT"}