diff --git a/assets/mods/basegame/crafting/testrecipe.json b/assets/mods/basegame/crafting/testrecipe.json
index f5c6bd7c5..a8eb4a4f8 100644
--- a/assets/mods/basegame/crafting/testrecipe.json
+++ b/assets/mods/basegame/crafting/testrecipe.json
@@ -2,21 +2,21 @@
   "basegame:176": { /* A recipe for Wooden Platform */
     "workbench": "", /* Optional workbench TAGS separated by commas (e.g. smelter, saw) */
     "ingredients": [ /* Multiple ingredients denotes alternative recipes */
-      [2, 1, "$WOOD", 1, "$ROCK"] /* This recipe only requires one Wooden Plank */
+      [2, 1, "$WOOD", 5000, "$ROCK"] /* This recipe only requires one Wooden Plank */
     ]
   },
 
   "basegame:176": { /* alternative recipes can be added like this */
     "workbench": "SOME_WORKBENCH",
     "ingredients": [
-      [5, 1, "$ROCKWOOD"]
+      [5, 5000, "basegame:161"]
     ]
   },
 
   "basegame:161": {
     "workbench": "",
     "ingredients": [
-      [4, 1, "$WOOD"]
+      [4, 1, "$WOOD", 2, "$ROCK"]
     ]
   }
 }
\ No newline at end of file
diff --git a/assets/mods/basegame/items/itemid.csv b/assets/mods/basegame/items/itemid.csv
index 710e683bb..fa7775389 100644
--- a/assets/mods/basegame/items/itemid.csv
+++ b/assets/mods/basegame/items/itemid.csv
@@ -7,5 +7,8 @@ id;classname
 7;net.torvald.terrarum.modulebasegame.gameitems.WireGraphDebugger
 8;net.torvald.terrarum.modulebasegame.gameitems.ItemLogicSignalEmitter
 9;net.torvald.terrarum.modulebasegame.gameitems.WireCutterAll
+10;net.torvald.terrarum.modulebasegame.gameitems.ItemTypewriter
 
-999;net.torvald.terrarum.modulebasegame.gameitems.ItemTapestry
+
+999998;net.torvald.terrarum.modulebasegame.gameitems.ItemTestDoor
+999999;net.torvald.terrarum.modulebasegame.gameitems.ItemTapestry
diff --git a/assets/mods/basegame/sprites/fixtures/typewriter.tga b/assets/mods/basegame/sprites/fixtures/typewriter.tga
new file mode 100644
index 000000000..404b70be8
--- /dev/null
+++ b/assets/mods/basegame/sprites/fixtures/typewriter.tga
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0baeb8a3b7ccaf80e420e9ac14fb6bb8059384c4cdd5495188534ba1cbf9151b
+size 24594
diff --git a/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureTypewriter.kt b/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureTypewriter.kt
new file mode 100644
index 000000000..1c9d206c6
--- /dev/null
+++ b/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureTypewriter.kt
@@ -0,0 +1,42 @@
+package net.torvald.terrarum.modulebasegame.gameactors
+
+import net.torvald.terrarum.gameactors.AVKey
+import net.torvald.terrarum.langpack.Lang
+
+/**
+ * Created by minjaesong on 2022-08-26.
+ */
+class FixtureTypewriter : FixtureBase {
+
+    var typewriterKeymapName = "us_qwerty" // used to control the keyboard input behaviour
+        private set
+
+    private var carriagePosition = 0
+
+    // constructor used when new typewriter is created
+    constructor(keymapName: String) : this() {
+        typewriterKeymapName = keymapName
+    }
+
+    // constructor used when the game loads from the savefile
+    constructor() : super(
+            BlockBox(BlockBox.NO_COLLISION, 1, 1),
+            nameFun = { Lang["ITEM_TYPEWRITER"] }
+    ) {
+
+        density = 2000.0
+
+        setHitboxDimension(16, 16, 8, 0)
+
+        makeNewSprite(FixtureBase.getSpritesheet("basegame", "sprites/fixtures/typewriter.tga", 32, 16)).let {
+            it.setRowsAndFrames(1,1)
+        }
+
+        actorValue[AVKey.BASEMASS] = 3.6
+    }
+
+    companion object {
+        const val TYPEWRITER_COLUMNS = 64
+    }
+
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/modulebasegame/gameitems/ItemTypewriter.kt b/src/net/torvald/terrarum/modulebasegame/gameitems/ItemTypewriter.kt
new file mode 100644
index 000000000..bcd0a119b
--- /dev/null
+++ b/src/net/torvald/terrarum/modulebasegame/gameitems/ItemTypewriter.kt
@@ -0,0 +1,30 @@
+package net.torvald.terrarum.modulebasegame.gameitems
+
+import com.badlogic.gdx.graphics.g2d.TextureRegion
+import net.torvald.terrarum.gameitems.ItemID
+import net.torvald.terrarum.itemproperties.Material
+import net.torvald.terrarum.modulebasegame.gameactors.FixtureTikiTorch
+
+/**
+ * Created by minjaesong on 2022-08-26.
+ */
+class ItemTypewriter(originalID: ItemID) : FixtureItemBase(originalID, "net.torvald.terrarum.modulebasegame.gameactors.FixtureTypewriter") {
+
+    override var dynamicID: ItemID = originalID
+    override val originalName = "ITEM_TYPEWRITER"
+    override var baseMass = FixtureTikiTorch.MASS
+    override var stackable = true
+    override var inventoryCategory = Category.MISC
+    override val isUnique = false
+    override val isDynamic = false
+    override val material = Material()
+    override val itemImage: TextureRegion
+        get() = getItemImageFromSheet("basegame", "sprites/fixtures/typewriter.tga", 32, 16)
+
+    override var baseToolSize: Double? = baseMass
+
+    init {
+        equipPosition = EquipPosition.HAND_GRIP
+    }
+
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/serialise/Common.kt b/src/net/torvald/terrarum/serialise/Common.kt
index 6582ee997..57bb17e05 100644
--- a/src/net/torvald/terrarum/serialise/Common.kt
+++ b/src/net/torvald/terrarum/serialise/Common.kt
@@ -56,8 +56,8 @@ object Common {
                 json.writeValue(obj?.toString())
             }
 
-            override fun read(json: Json, jsonData: JsonValue, type: Class<*>?): BigInteger {
-                return BigInteger(jsonData.asString())
+            override fun read(json: Json, jsonData: JsonValue, type: Class<*>?): BigInteger? {
+                return if (jsonData.isNull) null else BigInteger(jsonData.asString())
             }
         })
         // ZipCodedStr
@@ -186,8 +186,8 @@ object Common {
                 json.writeValue(obj.toString())
             }
 
-            override fun read(json: Json, jsonData: JsonValue, type: Class<*>?): UUID {
-                return UUID.fromString(jsonData.asString())
+            override fun read(json: Json, jsonData: JsonValue, type: Class<*>?): UUID? {
+                return if (jsonData.isNull) null else UUID.fromString(jsonData.asString())
             }
         })
         // HQRNG
@@ -209,8 +209,8 @@ object Common {
                 json.writeValue(bytesToZipdStr(obj.iterator()))
             }
 
-            override fun read(json: Json, jsonData: JsonValue, type: Class<*>?): ByteArray {
-                return strToBytes(StringReader(jsonData.asString())).toByteArray()
+            override fun read(json: Json, jsonData: JsonValue, type: Class<*>?): ByteArray? {
+                return if (jsonData.isNull) return null else strToBytes(StringReader(jsonData.asString())).toByteArray()
             }
         })
     }
diff --git a/work_files/graphics/sprites/fixtures/typewriter.kra b/work_files/graphics/sprites/fixtures/typewriter.kra
new file mode 100644
index 000000000..5f04153ac
--- /dev/null
+++ b/work_files/graphics/sprites/fixtures/typewriter.kra
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d6acee84531bcf2a4fae6586e67227b8c54d8f3b6358ed131526b6973cc9d87e
+size 118348