Undertale

Undertale came out on PC in 2015 and went on to Mac, Linux, PlayStation, Vita, Switch and Xbox — but never to phones. There is no official iOS version, and searching the App Store for it turns up sticker packs and fan quizzes rather than the game. This is a community port that adds full mobile support. Download the Undertale IPA for iPhone and play the whole thing on the device in your pocket.

It is the complete game, about 140 MB — small, because Undertale never needed to be big. You fall into a world of monsters and the game asks you one question over and over: are you going to fight them? Every enemy can be spared instead of killed, the combat is a bullet-hell minigame that changes personality with whoever you are facing, and the game remembers what you did. That last part is why people still talk about it a decade later.

Key features

• The full 2015 game with mobile controls added — not a demo or a spin-off
• Every route intact: pacifist, neutral and the one you should not take first
• Bullet-hell battles where sparing an enemy is always an option
• Toby Fox's soundtrack, one of the most covered in games
• Entirely offline and single-player — no account, no store connection, no ads

Get Undertale on builds.io — download the IPA and install it on your iPhone in one tap, no computer and no jailbreak. The install stays signed, so it does not expire on you a week into the underground.