diff --git a/stdlib/binser.lua b/stdlib/binser.lua
index d120f63..59dc64e 100644
--- a/stdlib/binser.lua
+++ b/stdlib/binser.lua
@@ -47,7 +47,7 @@ if not select then
             return #arg
         else
             local values = {}
-            for i = math.max(index + 1, 1), #arg do
+            for i = math.max(index, 1), #arg do
                 table.insert(values, arg[i])
             end
             return unpack(values)
diff --git a/stdlib/savedata.lua b/stdlib/savedata.lua
new file mode 100644
index 0000000..6256864
--- /dev/null
+++ b/stdlib/savedata.lua
@@ -0,0 +1,180 @@
+local self = {}
+
+local binser = require('stdlib.binser')
+require('stdlib.util')
+
+local savedataName
+local savedata = {
+  _lastSave = {0, 0, 0, 0, 0}
+}
+local loadedSavedata = false
+
+self.saveNextFrame = false
+
+---@param name string @a unique name for the entire modfile
+---@param forceIgnore boolean | nil
+--- for picking a name:
+--- please head to this link:
+--- https://www.random.org/strings/?num=1&len=16&digits=on&upperalpha=on&loweralpha=on&unique=on&format=plain&rnd=new
+--- and generate yourself a hash. afterwards, append it to your game name like so:
+--- savedata.initializeModule('myGameName_doAmaUOBIjiaSWyz')
+--- this helps ensure no collisions happen, breaking both of the modfiles in the process!
+--- **DON'T CHANGE THIS!!** else you'll break existing saves
+function self.initializeModule(name, forceIgnore)
+  if loadedSavedata then
+    error('uranium: cannot initialize savedata module after uranium.init!', 3)
+  end
+  if not forceIgnore then
+    if #name < 16 then
+      error('uranium: savedata name too short! must be at least 16 characters long', 2)
+    end
+
+    local normalChars = 0
+    local specialChars = 0
+    for i = 1, #name do
+      local char = string.sub(name, i, i)
+      local special = string.lower(char) == string.upper(char)
+      if special then
+        specialChars = specialChars + 1
+      else
+        normalChars = normalChars + 1
+      end
+    end
+
+    if normalChars < 4 then
+      error('uranium: savedata name should have at least 4 non-special characters!', 2)
+    end
+    if specialChars < 2 then
+      error('uranium: savedata name should have at least 2 special characters!', 2)
+    end
+  end
+
+  savedataName = name
+end
+
+local function checkIfInitialized()
+  if not savedataName then
+    error('uranium: savedata not initialized! please run savedata.initializeModule first', 3)
+  end
+end
+
+local function convertSource(s)
+  local pathSplit = split(s.source, '/')
+  local lastTwo = pathSplit[#pathSplit - 1] .. '/' .. string.sub(pathSplit[#pathSplit], 1, -5)
+  return lastTwo
+end
+
+---@param data table
+---@param name string | nil
+function self.s(data, name)
+  if not name then name = convertSource(debug.getinfo(2, 'S')) end
+  checkIfInitialized()
+  if loadedSavedata then
+    error('uranium: cannot add new savedata after initializing!', 3)
+  end
+  if string.sub(name, 1, 1) == '_' then
+    error('uranium: cannot start savedata name with an underscore', 2)
+  end
+  savedata[name] = data
+end
+
+--- prefers tab1 with type mismatches; prefers tab2 with value mismatches
+local function mergeTable(tab1, tab2)
+  local tab = {}
+  for k, v1 in pairs(tab1) do
+    local v2 = tab2[k]
+    if type(v1) ~= type(v2) then
+      tab[k] = v1
+    else
+      if type(v1) == 'table' then
+        tab[k] = mergeTable(v1, v2)
+      else
+        tab[k] = v2
+      end
+    end
+  end
+  return tab
+end
+
+--- replaces tab1 with tab2, preserving pointers
+--- this sucks
+local function replaceFromRoot(tab1, tab2)
+  local keys = {}
+  for k in pairs(tab1) do
+    if not includes(keys, k) then
+      table.insert(keys, k)
+    end
+  end
+  for k in pairs(tab2) do
+    if not includes(keys, k) then
+      table.insert(keys, k)
+    end
+  end
+
+  for _, key in ipairs(keys) do
+    if type(tab1[key]) == type(tab2[key]) and type(tab1[key]) == 'table' then
+      replaceFromRoot(tab1[key], tab2[key])
+    else
+      tab1[key] = tab2[key]
+    end
+  end
+end
+
+function self.load()
+  checkIfInitialized()
+  print('loading...')
+  local profile = PROFILEMAN:GetMachineProfile():GetSaved()
+  local save = {}
+  local serialized = profile[savedataName]
+
+  if not serialized then
+    print('no savedata found')
+    save = savedata
+  else
+    print('savedata found: ' .. serialized)
+    save = binser.deserializeN(serialized, 1)
+    print('deserialized: ' .. fullDump(save))
+  end
+
+  local newSavedata = mergeTable(savedata, save)
+  replaceFromRoot(savedata, newSavedata)
+  print('merged: ' .. fullDump(savedata))
+end
+
+---@param instant boolean | nil
+function self.save(instant)
+  checkIfInitialized()
+  print('saving...')
+  local profile = PROFILEMAN:GetMachineProfile():GetSaved()
+  savedata._lastSave = {Hour(), Minute(), DayOfMonth(), MonthOfYear(), Year()}
+  print('savedata: ' .. fullDump(savedata))
+  local serialized = binser.serialize(savedata)
+  print('serialized: ' .. serialized)
+  profile[savedataName] = serialized
+
+  uranium:call('save')
+  if instant then
+    PROFILEMAN:SaveMachineProfile()
+    uranium:call('saveFinished')
+  else
+    self.saveNextFrame = true
+  end
+end
+
+function uranium.init()
+  loadedSavedata = true
+  if savedataName then
+    self.load()
+  end
+end
+
+function uranium.update()
+  if self.saveNextFrame then
+    self.saveNextFrame = false
+    PROFILEMAN:SaveMachineProfile()
+    uranium:call('saveFinished')
+    print('saved to profile')
+  end
+end
+
+return self
\ No newline at end of file
diff --git a/stdlib/util.lua b/stdlib/util.lua
index 7f1dbd7..b98b0bc 100644
--- a/stdlib/util.lua
+++ b/stdlib/util.lua
@@ -154,4 +154,26 @@ function clearMetatables(tab)
       clearMetatables(obj)
     end
   end
+end
+
+---@param source string
+---@param sep string
+---@return string[]
+-- https://stackoverflow.com/a/42607786
+function split(source, sep)
+  local result, i = {}, 1
+  while true do
+    local a, b = string.find(source, sep)
+    if not a then break end
+    local candidat = string.sub(source, 1, a - 1)
+    if candidat ~= '' then
+      result[i] = candidat
+    end
+    i = i + 1
+    source = string.sub(source, b + 1)
+  end
+  if source ~= '' then
+    result[i] = source
+  end
+  return result
 end
\ No newline at end of file
diff --git a/typings.lua b/typings.lua
index bbfe5c9..80f7e48 100644
--- a/typings.lua
+++ b/typings.lua
@@ -11,6 +11,8 @@ GAMESTATE = {}
 PREFSMAN = {}
 ---@type ScreenManager
 SCREENMAN = {}
+---@type ProfileManager
+PROFILEMAN = {}
 
 ---@return Quad
 --- Defines a Quad actor.