Add Tunnet (#621)

Author: swooster

content/games/data.toml

@@ -624,6 +624,13 @@ categories = ["strategy"]
 homepage_url = "//cragwind.itch.io/triverse"
 image = "/assets/img/triverse.gif"
 
+[[items]]
+name = "Tunnet"
+description = "A first-person horror game about building a computer network to connect bunkers of an underground facility."
+categories = ["simulation", "other", "released"]
+homepage_url = "//store.steampowered.com/app/2286390/Tunnet"
+image = "/assets/img/tunnet.jpg"
+
 [[items]]
 name = "Turnfight"
 description = "Turnfight is an online multiplayer air combat game"