diff --git a/scripts/base.js b/scripts/base.js
index 1da9d57..e9992f8 100644
--- a/scripts/base.js
+++ b/scripts/base.js
@@ -320,6 +320,7 @@ json.encode = function(value, space, replacer, whitelist)
 
 json.decode = function(text, reviver)
 {
+  if (!text) return undefined;
   return JSON.parse(text,reviver);
 }
 
@@ -859,7 +860,7 @@ Object.defineProperty(String.prototype, 'dir', {
 });
 
 Object.defineProperty(String.prototype, 'splice', {
-  value: function(index, str, ) {
+  value: function(index, str) {
     return this.slice(0,index) + str + this.slice(index);
   }
 });
@@ -881,6 +882,28 @@ Object.defineProperty(String.prototype, 'updir', {
   }
 });
 
+Object.defineProperty(String.prototype, 'trimchr', {
+  value: function(chars) {
+    var start = this.length;
+    var end = 0;
+    for (var i = 0; i < this.length; i++) {
+      if (!chars.includes(this[i])) {
+        start = i;
+	break;
+      }
+    }
+
+    for (var i = this.length-1; i >= 0; i--) {
+      if (!chars.includes(this[i])) {
+        end = i+1;
+	break;
+      }
+    }
+
+    return this.substring(start,end);
+  }
+});
+
 Object.defineProperty(String.prototype, 'startswith', {
   value: function(val) {
     if (!val) return false;
@@ -1573,4 +1596,3 @@ return {
   Vector,
   bbox
 };
-
diff --git a/scripts/engine.js b/scripts/engine.js
index 2977704..74f6392 100644
--- a/scripts/engine.js
+++ b/scripts/engine.js
@@ -4,7 +4,7 @@ globalThis.global = globalThis;
 function use(file)
 {
   if (use.files[file]) return use.files[file];
-  
+    
   var c = io.slurp(file);
   
   var script = `(function() { ${c} })();`;
@@ -52,7 +52,85 @@ var load = use;
 
 Object.assign(global, use("scripts/base.js"));
 global.obscure('global');
+global.mixin("scripts/render.js");
+
+global.Game = {
+  engine_start(fn) {
+    cmd(257, fn);
+  },
+
+  native: render.device.pc,
+
+  object_count() {
+    return cmd(214);
+  },
+
+  all_objects(fn) {
+    /* Wind down from Primum */
+  },
+
+  /* Returns a list of objects by name */
+  find(name) {
+    
+  },
+
+  /* Return a list of objects derived from a specific prototype */
+  find_proto(proto) {
+
+  },
+
+  /* List of all objects spawned that have a specific tag */
+  find_tag(tag){
+
+  },
+
+  quit() {
+    sys_cmd(0);
+    return;
+  },
+
+  pause() { sys_cmd(3); },
+  stop() { Game.pause(); },
+  step() { sys_cmd(4);},
+  editor_mode(m) { sys_cmd(10, m); },
+  playing() { return sys_cmd(5); },
+  paused() { return sys_cmd(6); },
+  stepping() { return cmd(79); },
+  play() { sys_cmd(1); },
+  
+  wait_fns: [],
+
+  wait_exec(fn) {
+    if (!phys_stepping())
+      fn();
+    else
+      this.wait_fns.push(fn);
+  },
+
+  exec() {
+    this.wait_fns.forEach(function(x) { x(); });
+
+    this.wait_fns = [];
+  },
+};
+
+Game.gc = function() { cmd(259); }
+Game.gc.doc = "Force the garbage collector to run.";
+
+Game.doc = {};
+Game.doc.object = "Returns the entity belonging to a given id.";
+Game.doc.quit = "Immediately quit the game.";
+Game.doc.pause = "Pause game simulation.";
+Game.doc.stop = "Stop game simulation. This does the same thing as 'pause', and if the game is a debug build, starts its editor.";
+Game.doc.play = "Resume or start game simulation.";
+Game.doc.editor_mode = "Set to true for the game to only update on input; otherwise the game updates every frame.";
+Game.doc.dt = "Current frame dt.";
+Game.doc.view_camera = "Set the camera for the current view.";
+Game.doc.camera = "Current camera.";
+
+global.mixin("scripts/input.js");
 global.mixin("scripts/std.js");
+
 global.mixin("scripts/diff.js");
 
 console.level = 1;
@@ -140,9 +218,9 @@ var timer = {
 };
 
 global.mixin("scripts/tween.js");
-global.mixin("scripts/render.js");
+
 global.mixin("scripts/physics.js");
-global.mixin("scripts/input.js");
+
 
 global.mixin("scripts/ai.js");
 global.mixin("scripts/geometry.js");
@@ -297,78 +375,6 @@ global.mixin("scripts/debug.js");
 global.mixin("scripts/spline.js");
 global.mixin("scripts/components.js");
 
-var Game = {
-  engine_start(fn) {
-    cmd(257, fn);
-  },
-
-  native: render.device.pc,
-
-  object_count() {
-    return cmd(214);
-  },
-
-  all_objects(fn) {
-    /* Wind down from Primum */
-  },
-
-  /* Returns a list of objects by name */
-  find(name) {
-    
-  },
-
-  /* Return a list of objects derived from a specific prototype */
-  find_proto(proto) {
-
-  },
-
-  /* List of all objects spawned that have a specific tag */
-  find_tag(tag){
-
-  },
-
-  quit() {
-    sys_cmd(0);
-    return;
-  },
-  pause() { sys_cmd(3); },
-  stop() { Game.pause(); },
-  step() { sys_cmd(4);},
-  editor_mode(m) { sys_cmd(10, m); },
-  playing() { return sys_cmd(5); },
-  paused() { return sys_cmd(6); },
-  stepping() { return cmd(79); },
-  play() { sys_cmd(1); },
-  
-  wait_fns: [],
-
-  wait_exec(fn) {
-    if (!phys_stepping())
-      fn();
-    else
-      this.wait_fns.push(fn);
-  },
-
-  exec() {
-    this.wait_fns.forEach(function(x) { x(); });
-
-    this.wait_fns = [];
-  },
-};
-
-Game.gc = function() { cmd(259); }
-Game.gc.doc = "Force the garbage collector to run.";
-
-Game.doc = {};
-Game.doc.object = "Returns the entity belonging to a given id.";
-Game.doc.quit = "Immediately quit the game.";
-Game.doc.pause = "Pause game simulation.";
-Game.doc.stop = "Stop game simulation. This does the same thing as 'pause', and if the game is a debug build, starts its editor.";
-Game.doc.play = "Resume or start game simulation.";
-Game.doc.editor_mode = "Set to true for the game to only update on input; otherwise the game updates every frame.";
-Game.doc.dt = "Current frame dt.";
-Game.doc.view_camera = "Set the camera for the current view.";
-Game.doc.camera = "Current camera.";
 
 Window.doc = {};
 Window.doc.width = "Width of the game window.";
diff --git a/scripts/entity.js b/scripts/entity.js
index 7762256..d30dcad 100644
--- a/scripts/entity.js
+++ b/scripts/entity.js
@@ -461,8 +461,8 @@ var gameobject = {
     alive() { return this.body >= 0; },
     in_air() { return q_body(7, this.body);},
 
-  hide() { this.components.forEach(x=>x.hide()); this.objects.forEach(x=>x.hide());},
-  show() { this.components.forEach(function(x) { x.show(); }); this.objects.forEach(function(x) { x.show(); }); },
+  hide() { this.components.forEach(x=>x.hide?.()); this.objects.forEach(x=>x.hide?.());},
+  show() { this.components.forEach(function(x) { x.show?.(); }); this.objects.forEach(function(x) { x.show?.(); }); },
 
   width() {
     var bb = this.boundingbox();
@@ -817,11 +817,15 @@ function apply_ur(u, e)
       return;
     }
 
-    if (topur.text)
-      feval_env(topur.text, e);
+    if (topur.text) {
+      var script = Resources.replstrs(topur.text);
+      eval_env(script, e, topur.text);
+    }
       
-    if (topur.data)
-      Object.merge(config, json.decode(io.slurp(topur.data)));
+    if (topur.data) {
+      var jss = Resources.replstrs(topur.data);
+      Object.merge(config, json.decode(jss));
+    }
   }
 
   Object.merge(e, config);
diff --git a/scripts/std.js b/scripts/std.js
index ccabd4f..62fdf28 100644
--- a/scripts/std.js
+++ b/scripts/std.js
@@ -1,5 +1,32 @@
 os.cwd.doc = "Get the absolute path of the current working directory.";
 os.env.doc = "Return the value of the environment variable v.";
+os.platform = "steam";
+if (os.sys === 'windows')
+  os.user = os.env("USERNAME");
+else
+  os.user = os.env("USER");
+
+var steam = {};
+steam.appid = 480;
+steam.userid = 8437843;
+
+os.home = os.env("HOME");
+
+steam.path = {
+  windows: `C:/Program Files (x86)/Steam/userdata/${steam.userid}/${steam.appid}`,
+  macos: `${os.home}/Library/Application Support/Steam/userdata/${steam.userid}/${steam.appid}`,
+  linux: `${os.home}/.local/share/Steam/userdata/${steam.userid}/${steam.appid}`
+};
+
+var otherpath = {
+  windows:`C:/Users/${os.user}/Saved Games`,
+  macos: `${os.home}/Library/Application Support`,
+  linux: `${os.home}/.local/share`
+}
+
+os.prefpath = function() {
+  return otherpath[os.sys()] + "/" + (Game.title ? Game.title : "Untitled Prosperon Game");
+}
 
 var projectfile = ".prosperon/project.json";
 
@@ -25,12 +52,37 @@ Resources.is_animation = function(path)
   return false;
 }
 
+Resources.is_path = function(str)
+{
+  return !/[\\\/:*?"<>|]/.test(str);
+}
+
 Resources.texture = {};
 Resources.texture.dimensions = function(path) { return cmd(64,path); }
 
 Resources.gif = {};
 Resources.gif.frames = function(path) { return cmd(139,path); }
 
+Resources.replpath = function(str, path)
+{
+  if (str[0] === "/")
+    return str.rm(0);
+
+  if (str[0] === "@")
+    return os.prefpath() + "/" + str.rm(0);
+
+  if (!path) return str;
+
+  var stem = path.dir();
+  while (stem) {
+    var tr = stem + "/" +str;
+    if (io.exists(tr)) return tr;
+    stem = steam.updir();
+  }
+  
+  return str;
+}
+
 Resources.replstrs = function(path)
 {
   var script = io.slurp(path);
@@ -38,13 +90,8 @@ Resources.replstrs = function(path)
   var stem = path.dir();
 
   script = script.replace(regexp,function(str) {
-    if (str[1] === "/")
-      return str.rm(1);
-
-    if (str[1] === "@")
-      return str.rm(1).splice(1, "playerpath/");
-
-    return str.splice(1, stem + "/");
+    var newstr = Resources.replpath(str.trimchr('"'), path);
+    return `"${newstr}"`;
   });
 
   return script;
@@ -146,14 +193,65 @@ console.doc = {
 /*
   io path rules. Starts with, meaning:
   "@": user path
-  "/": game path
+  "/": root game path
+  "" : relative game path
 */
 
-var tmp = io.chmod;
+var tmpchm = io.chmod;
 io.chmod = function(file,mode) {
-  return tmp(file,parseInt(mode,8));
+  return tmpchm(file,parseInt(mode,8));
 }
-  
+
+
+var tmpslurp = io.slurp;
+io.slurp = function(path)
+{
+  path = Resources.replpath(path);
+  return tmpslurp(path);
+}
+
+var tmpslurpb = io.slurpbytes;
+io.slurpbytes = function(path)
+{
+  path = Resources.replpath(path);
+  return tmpslurpb(path);
+}
+
+io.mkpath = function(dir)
+{
+  var mkstack = [];
+  while (!io.exists(dir)) {
+    mkstack.push(dir.fromlast('/'));
+    dir = dir.dir();
+  }
+  for (var d of mkstack) {
+    dir = dir + "/" + d;
+    say(`making ${dir}`);
+    io.mkdir(dir);
+  }
+}
+
+var tmpslurpw = io.slurpwrite;
+io.slurpwrite = function(path, c)
+{
+  path = Resources.replpath(path);
+  io.mkpath(path.dir());
+  return tmpslurpw(path, c);
+}
+
+var tmpcp = io.cp;
+io.cp = function(f1,f2)
+{
+  io.mkpath(f2.dir());
+  tmpcp(f1,f2);
+}
+
+var tmprm = io.rm;
+io.rm = function(f)
+{
+  tmprm(Resources.replpath(f));
+}
+
 io.mixin({
   extensions(ext) {
     var paths = io.ls();
@@ -226,7 +324,7 @@ Cmdline.register_order("edit", function() {
 }, "Edit the project in this folder. Give it the name of an UR to edit that specific object.", "?UR?");
 
 Cmdline.register_order("init", function() {
-  if (io.exists(".prosperon")) {
+  if (io.exists(projectfile)) {
     say("Already a game here.");
     return;
   }
@@ -255,6 +353,7 @@ Cmdline.register_order("play", function() {
   }
 
   var project = json.decode(io.slurp(projectfile));
+  Game.title = project.title;
   global.mixin("config.js");
   if (project.title) Window.title(project.title);
   
@@ -490,7 +589,7 @@ return {
   console,
   Resources,
   say,
-  io,
   Cmdline,
-  cmd_args
+  cmd_args,
+  steam
 };
diff --git a/source/engine/jsffi.c b/source/engine/jsffi.c
index 8df78a7..4da9e43 100644
--- a/source/engine/jsffi.c
+++ b/source/engine/jsffi.c
@@ -1909,9 +1909,22 @@ JSValue js_os_env(JSContext *js, JSValueConst this, int argc, JSValue *argv)
   return ret;
 }
 
+JSValue js_os_sys(JSContext *js, JSValueConst this)
+{
+  #ifdef __linux__
+  return str2js("linux");
+  #elif defined(_WIN32) || defined(_WIN64)
+  return str2js("windows");
+  #elif defined(__APPLE__)
+  return str2js("macos");
+  #endif
+  return JS_UNDEFINED;
+}
+
 static const JSCFunctionListEntry js_os_funcs[] = {
   MIST_CFUNC_DEF("cwd", 0, js_os_cwd),
   MIST_CFUNC_DEF("env", 1, js_os_env),
+  MIST_CFUNC_DEF("sys", 0, js_os_sys),
 };
 
 JSValue js_io_exists(JSContext *js, JSValueConst this, int argc, JSValue *argv)
@@ -1952,6 +1965,7 @@ JSValue js_io_mv(JSContext *js, JSValueConst this, int argc, JSValue *argv)
 JSValue js_io_rm(JSContext *js, JSValueConst this, int argc, JSValue *argv)
 {
   char *file = JS_ToCString(js, argv[0]);
+  JSValue ret = int2js(remove(file));
   JS_FreeCString(js,file);
   return JS_UNDEFINED;
 }
@@ -1979,6 +1993,7 @@ JSValue js_io_slurp(JSContext *js, JSValueConst this, int argc, JSValue *argv)
 {
   char *f = js2str(argv[0]);
   size_t len;
+
   char *s = slurp_text(f,&len);
   JS_FreeCString(js,f);
 
diff --git a/source/engine/resources.c b/source/engine/resources.c
index cafec78..b6a26de 100644
--- a/source/engine/resources.c
+++ b/source/engine/resources.c
@@ -207,7 +207,7 @@ int cp(const char *p1, const char *p2)
   size_t len;
   void *data = slurp_file(p1, &len);
 
-  FILE *f = fopen_mkdir(p2, "w");
+  FILE *f = fopen(p2, "w");
   if (!f) return 1;
   fwrite(data, len, 1, f);
   free(data);
@@ -215,34 +215,23 @@ int cp(const char *p1, const char *p2)
   return 0;
 }
 
-void rek_mkdir(char *path) {
-    char *sep = strrchr(path, '/');
-    if(sep != NULL) {
-        *sep = 0;
-        rek_mkdir(path);
-        *sep = '/';
-    }
-#if defined __WIN32    
-    if(mkdir(path) && errno != EEXIST)
-#else
-    if (mkdir(path, 0777) && errno != EEXIST)
-#endif    
-        printf("error while trying to create '%s'\n%m\n", path); 
-}
+int mkpath(char *dir, mode_t mode)
+{
+  if (!dir) {
+      errno = EINVAL;
+      return 1;
+  }
 
-FILE *fopen_mkdir(const char *path, const char *mode) {
-    char *sep = strrchr(path, '/');
-    if(sep) { 
-        char *path0 = strdup(path);
-        path0[ sep - path ] = 0;
-        rek_mkdir(path0);
-        free(path0);
-    }
-    return fopen(path,mode);
+  if (strlen(dir) == 1 && dir[0] == '/')
+      return 0;
+
+//  mkpath(dirname(strdupa(dir)), mode);
+
+  return mkdir(dir, mode);
 }
 
 int slurp_write(const char *txt, const char *filename, size_t len) {
-  FILE *f = fopen_mkdir(filename, "w");
+  FILE *f = fopen(filename, "w");
   if (!f) return 1;
 
   if (len < 0) len = strlen(txt);
diff --git a/source/engine/resources.h b/source/engine/resources.h
index 1c40432..c7cff9f 100644
--- a/source/engine/resources.h
+++ b/source/engine/resources.h
@@ -16,7 +16,6 @@ FILE *path_open(const char *tag, const char *fmt, ...);
 char **ls(const char *path);
 int cp(const char *p1, const char *p2);
 int fexists(const char *path);
-FILE *fopen_mkdir(const char *path, const char *mode);
 
 char *dirname(const char *path);