diff --git a/nim/src/gildedrose.nim b/nim/src/gildedrose.nim
new file mode 100644
index 00000000..69129341
--- /dev/null
+++ b/nim/src/gildedrose.nim
@@ -0,0 +1,35 @@
+import items
+
+proc updateQuality*(items: var seq[Item]) =
+  for i in 0 ..< items.len:
+    if items[i].name != "Aged Brie" and items[i].name != "Backstage passes to a TAFKAL80ETC concert":
+      if items[i].quality > 0:
+        if items[i].name != "Sulfuras, Hand of Ragnaros":
+          items[i].quality = items[i].quality - 1
+    else:
+      if items[i].quality < 50:
+        items[i].quality = items[i].quality + 1
+
+        if items[i].name == "Backstage passes to a TAFKAL80ETC concert":
+          if items[i].sellIn < 11:
+            if items[i].quality < 50:
+              items[i].quality = items[i].quality + 1
+          
+          if items[i].sellIn < 6:
+            if items[i].quality < 50:
+              items[i].quality = items[i].quality + 1
+    
+    if items[i].name != "Sulfuras, Hand of Ragnaros":
+      items[i].sellIn = items[i].sellIn - 1
+    
+    if items[i].sellIn < 0:
+      if items[i].name != "Aged Brie":
+        if items[i].name != "Backstage passes to a TAFKAL80ETC concert":
+          if items[i].quality > 0:
+            if items[i].name != "Sulfuras, Hand of Ragnaros":
+              items[i].quality = items[i].quality - 1
+        else:
+          items[i].quality = items[i].quality - items[i].quality
+      else:
+        if items[i].quality < 50:
+          items[i].quality = items[i].quality + 1
diff --git a/nim/src/items.nim b/nim/src/items.nim
new file mode 100644
index 00000000..bb9527dd
--- /dev/null
+++ b/nim/src/items.nim
@@ -0,0 +1,12 @@
+import strformat
+
+type
+  Item* = object
+    name*: string
+    sellIn*, quality*: int
+  
+proc initItem*(name: string, sellIn, quality: int): Item =
+  Item(name: name, sellIn: sellIn, quality: quality)
+
+proc `$`*(item: Item): string =
+  &"{item.name}, {item.sellIn}, {item.quality}"
diff --git a/nim/test/gilded.nim b/nim/test/gilded.nim
new file mode 100644
index 00000000..5def5628
--- /dev/null
+++ b/nim/test/gilded.nim
@@ -0,0 +1,126 @@
+import unittest
+import ../src/items
+import ../src/gildedrose
+
+let list = @[
+  initItem("+5 Dexterity Vest", 10, 20),
+  initItem("Aged Brie", 2, 0),
+  # this doesn't have any special treatment, but if you want you can think of something and add a test
+  initItem("Elixir of the Mongoose", 5, 7),
+  initItem("Sulfuras, Hand of Ragnaros", 0, 80),
+  initItem("Sulfuras, Hand of Ragnaros", -1, 80),
+  initItem("Backstage passes to a TAFKAL80ETC concert", 15, 20),
+  initItem("Backstage passes to a TAFKAL80ETC concert", 10, 49),
+  initItem("Backstage passes to a TAFKAL80ETC concert", 5, 49),
+  # this conjured item does not work properly yet
+  initItem("Conjured Mana Cake", 3, 6)
+]
+
+template checkItem(item: Item, s, q: int) =
+  check:
+    item.sellIn == s
+    item.quality == q
+
+proc days(count: int): seq[Item] =
+    var items = list
+    for _ in 1 .. count:
+      items.updateQuality()
+    items
+
+suite "+5 Dexterity Vest [0]":
+
+  test "1 day":
+    var items = days(1)
+    checkItem(items[0], 9, 19)
+
+  test "5 days, check for cumulative depeciation":
+    let items = days(5)
+    checkItem(items[0], 5, 15)
+  
+  test "10 days, expiration day":
+    let items = days 10
+    checkItem(items[0], 0, 10)
+
+  test "14 days, check for expired depreciation":
+    let items = days(14)
+    checkItem(items[0], -4, 2)
+
+  test "20 days, quality should not be negative":
+    let items = days 20
+    checkItem(items[0], -10, 0)
+
+suite "Aged Brie [1]":
+  test "1 day, brie increases value":
+    let items = days(1)
+    checkItem(items[1], 1, 1)
+
+  test "2 days, expiration day":
+    let items = days(2)
+    checkItem(items[1], 0, 2)
+
+  test "4 days, extra increase after expiration":
+    let items = days(4)
+    checkItem(items[1], -2, 6)
+
+  test "30 days, should reach max quality":
+    let items = days 30
+    checkItem items[1], -28, 50
+
+suite "Sulfuras, Hand of Ragnaros [3]":
+  test "1 day":
+    let items = days(1)
+    checkItem(items[3], 0, 80)
+
+  test "2 days":
+    let items = days(2)
+    checkItem(items[3], 0, 80)
+
+suite "Sulfuras, Hand of Ragnaros [4]":
+  test "1 day":
+    let items = days(1)
+    checkItem(items[4], -1, 80)
+
+
+suite "Backstage passes to a TAFKAL80ETC concert [5]":
+  test "1 day":
+    let items= days(1)
+    checkItem(items[5], 14, 21)
+  
+  test "5 days":
+    let items = days 5
+    checkItem items[5], 10, 25
+
+  test "7 days, increase appreciation":
+    let items = days 7
+    checkItem items[5], 8, 29
+
+  test "12 days, extra increased appriciation":
+    let items = days 12
+    checkItem items[5], 3, 41
+  
+  test "14 days, day before concert":
+    let items = days 14
+    checkItem items[5], 1, 47
+
+  test "16 days, day after concert":
+    let items = days 16
+    checkItem items[5], -1, 0
+
+suite "Backstage passes to a TAFKAL80ETC concert [6]":
+  test "1 day, should reach max quality even though concert is soon":
+    let items = days 1
+    checkItem items[6], 9, 50
+
+  test "11 days, day after concert":
+    let items = days 11
+    checkItem items[6], -1, 0
+
+suite "Backstage passes to a TAFKAL80ETC concert [7]":
+  test "1 day, should reach max quality even though concert is imminent":
+    let items = days 1
+    checkItem items[7], 4, 50
+
+suite "Conjured Mana cake [8]":
+  test "1 day, should decrease by double":
+    let items = days 1
+    checkItem items[8], 2, 4