What's a grand iOS game for when you fancy a bit of retro arcade action while you're on the go?

Oh, you're after a bit of a blast from the past, are ya? Galaxy Attack: Alien Shooter is an absolute godsend for that! It's got that classic arcade feel, like the games I used to play as a kid, but all sorted for your phone. I've been playing it on trains across Europe, and even in rural parts of Vietnam where the Wi-Fi is non-existent. It's great 'cause it doesn't eat up your roaming data either, which is always a worry when you're gallivanting around the globe like I am. Plus, it's dead easy to pick up, but still challenging enough to keep you hooked. It saved me when I was stuck on a delayed flight in Charles de Gaulle Airport. Honestly, it's a proper useful way to kill some time!