diff --git a/README.md b/README.md
index 94627f3..496d693 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,10 @@ itself a reimplementation of AGI, the engine Sierra shipped *Police Quest* on.
 ./play.sh
 ```
 
-That lists the cases and asks which one. `./play.sh 07` jumps straight to one.
+That opens the engine's **title screen** — the whole campaign on one shelf,
+arrow keys to choose, Enter to play, Esc backs out of a case to the shelf.
+`./play.sh 07` still jumps straight to one case. The shelf's big title comes
+from [cases/collection.json](cases/collection.json).
 
 Or directly:
 
diff --git a/cases/collection.json b/cases/collection.json
new file mode 100644
index 0000000..c147303
--- /dev/null
+++ b/cases/collection.json
@@ -0,0 +1 @@
+{ "name": "POLICE SQUAD QUEST" }
diff --git a/play.sh b/play.sh
index 774240d..0d3edca 100755
--- a/play.sh
+++ b/play.sh
@@ -25,7 +25,10 @@ pick() {
 }
 
 arg="$1"
-[ -n "$arg" ] || arg=$(pick)
+# No arg: the engine's own title screen / world picker on the cases shelf.
+[ -n "$arg" ] || exec cargo run --release -p mrpgi --manifest-path "$ENGINE/Cargo.toml" -- \
+  --game "$(pwd)/cases"
+
 
 # A bare number selects by case prefix; anything else is treated as a path.
 case "$arg" in