diff --git a/levels/puzzle-apocalypse/description b/levels/puzzle-apocalypse/description
new file mode 100644
index 0000000..917154d
--- /dev/null
+++ b/levels/puzzle-apocalypse/description
@@ -0,0 +1,9 @@
+Delete all objects in this repository using git commands only!
+
+Useful commands:
+
+    git prune
+    git fsck
+    git reflog expire
+
+Note: I'm not sure how to beat this level. :D
diff --git a/levels/puzzle-apocalypse/goal b/levels/puzzle-apocalypse/goal
new file mode 100644
index 0000000..b24313d
--- /dev/null
+++ b/levels/puzzle-apocalypse/goal
@@ -0,0 +1,4 @@
+TREE=$(git mktree)
+git read-tree $TREE
+rm -rf .git/refs/*
+rm -rf .git/objects/*
diff --git a/levels/puzzle-apocalypse/start b/levels/puzzle-apocalypse/start
new file mode 100644
index 0000000..62fdc47
--- /dev/null
+++ b/levels/puzzle-apocalypse/start
@@ -0,0 +1,9 @@
+echo foo > foo
+BLOB=$(git hash-object -w foo)
+echo bar > bar
+git add .
+git commit -m "Initial commit"
+echo blabber >> bar
+git commit -a -m "Second commit"
+git update-ref refs/important HEAD
+git update-ref refs/interesting "$BLOB"
diff --git a/levels/puzzle-apocalypse/win b/levels/puzzle-apocalypse/win
new file mode 100644
index 0000000..3409172
--- /dev/null
+++ b/levels/puzzle-apocalypse/win
@@ -0,0 +1 @@
+test "$(git cat-file --batch-check --batch-all-objects | wc -l)" -eq 0
diff --git a/levels/puzzle-precious-blob/description b/levels/puzzle-precious-blob/description
new file mode 100644
index 0000000..151d979
--- /dev/null
+++ b/levels/puzzle-precious-blob/description
@@ -0,0 +1 @@
+Create two trees pointing to the same blob!
diff --git a/levels/puzzle-precious-blob/goal b/levels/puzzle-precious-blob/goal
new file mode 100644
index 0000000..6f7a3b3
--- /dev/null
+++ b/levels/puzzle-precious-blob/goal
@@ -0,0 +1,7 @@
+BLOB=$(echo "I am precious" | git hash-object -w --stdin)
+git update-index --add --cacheinfo 100644,$BLOB,a
+git write-tree
+git update-index --force-remove a
+git update-index --add --cacheinfo 100644,$BLOB,b
+git write-tree
+git update-index --force-remove b
diff --git a/levels/puzzle-precious-blob/win b/levels/puzzle-precious-blob/win
new file mode 100644
index 0000000..b7f955f
--- /dev/null
+++ b/levels/puzzle-precious-blob/win
@@ -0,0 +1,10 @@
+TREES=$(git cat-file --batch-check='%(objectname) %(objecttype)' --batch-all-objects | grep tree | cut -f1 -d" ")
+
+ALL_TREE_CHILDREN=$(for TREE in $TREES; do
+    git cat-file -p $TREE | cut -f1 | cut -f3 -d" "
+done)
+
+NUMBER_OF_CHILDREN=$(echo "$ALL_TREE_CHILDREN" | wc -l)
+UNIQUE_CHILDREN=$(echo "$ALL_TREE_CHILDREN" | sort -u | wc -l)
+
+test "$NUMBER_OF_CHILDREN" -gt "$UNIQUE_CHILDREN"
diff --git a/levels/puzzle-trees-all-the-way-down/description b/levels/puzzle-trees-all-the-way-down/description
new file mode 100644
index 0000000..f38ca57
--- /dev/null
+++ b/levels/puzzle-trees-all-the-way-down/description
@@ -0,0 +1,3 @@
+Construct a chain of three trees.
+
+This is hard! The `git mktree` command might be useful.
diff --git a/levels/puzzle-trees-all-the-way-down/goal b/levels/puzzle-trees-all-the-way-down/goal
new file mode 100644
index 0000000..5e62d7d
--- /dev/null
+++ b/levels/puzzle-trees-all-the-way-down/goal
@@ -0,0 +1,3 @@
+git mktree
+TREE=$(echo -e "040000 tree 4b825dc642cb6eb9a060e54bf8d69288fbee4904\tdir" | git mktree)
+echo -e "040000 tree $TREE\tdir" | git mktree
diff --git a/levels/puzzle-trees-all-the-way-down/win b/levels/puzzle-trees-all-the-way-down/win
new file mode 100644
index 0000000..4a8a6d2
--- /dev/null
+++ b/levels/puzzle-trees-all-the-way-down/win
@@ -0,0 +1,18 @@
+TREES=$(git cat-file --batch-check='%(objectname) %(objecttype)' --batch-all-objects | grep tree | cut -f1 -d" ")
+
+for TREE in $TREES; do
+    if [ "$(git cat-file -p $TREE | wc -l)" -eq 1 ]; then
+        if [ "$(git cat-file -p $TREE | cut -f1 | grep tree | wc -l)" -eq 1 ]; then
+            # So the tree has exactly one child, and it is a tree!
+            TREE2=$(git cat-file -p $TREE | cut -f1 | grep tree | cut -f3 -d" ")
+            if [ "$(git cat-file -p $TREE2 | wc -l)" -eq 1 ]; then
+                if [ "$(git cat-file -p $TREE2 | cut -f1 | grep tree | wc -l)" -eq 1 ]; then
+                    # Same for its child! \o/
+                    exit 0
+                fi
+            fi
+        fi
+    fi
+done
+
+exit 1