Siegecraft Commander from Blowfish Games allows you to create the ultimate medieval fortress. This ID@Xbox game for Xbox One and Windows 10 is a turned based game that has you playing as either humans or lizardmen. Your objective is to try to take out the other race. In order to do this, you must build a vast network of towers which then allow you to add more towers or simply attack your enemy.

Passwords are weak and often cracked. Two-factor authentication, which uses your phone number to send a secondary code you have to enter, is much stronger.

I know first-hand how scary password hacks can be, but I still put off two-factor authentication for years — relying instead on a strong multi-digit 1Password-generated password — because it felt clunky and hard to set up. What if I lost access to my phone number because I was restoring my iPhone? What if I couldn’t get network access for my two-factor code? Too much hassle, I thought.

Authy changed my opinion on two-factor authentication: The app makes it far less terrifying to deal with; it also lives on both my Mac and iOS devices, so I don’t have to worry about losing access to my accounts while my phone is restoring. Authy was recently acquired by Twillo, but the company still plans to support its two-factor authentication customers, so you don’t have to worry about it mysteriously disappearing anytime soon.

What is two-factor authentication?

Two-factor authentication is the most prevalent way to secure your accounts: It asks you to authenticate that you are who you say you are by supplying not only your password, but a six-digit code supplied from your phone or an external app. It ensures that those accessing your accounts have access to your physical devices as well as your virtual passwords, and makes a simple password crack or social engineering hack a lot harder to execute.

How to set up Authy

Downloading and setting up Authy is simple: The app is free and available for both iOS and Android, as well as on your computer as a Google Chrome plugin. Once you download Authy, you’ll be asked to set it up with your primary phone number via a call or text message; once you do so, you’re ready to start adding third-party services.

Add third-party services to Authy via code generation

Authy connects to any service that integrates with Google Authenticator for two-factor authentication; the Google service lets you randomly generate two-factor authentication tokens even while offline.

Authy supports a slew of different options, including your Google accounts, Facebook, Tumblr, Dropbox, Outlook, Evernote, Amazon Web Services, WordPress, DreamHost, and LastPass, among others. Sadly, you won’t be able to hook up your iCloud account or Twitter to Authy.

To use Authy with these services, you need to make sure they have code generation turned on. Each service has a slightly different way of enabling this, but in general you should find it under the Security section of your preferences. As an example, here’s Google’s setup screen below.

When you click to enable code generation, you’ll be presented with a barcode; scan this with the Authy app to add the account.

Once you’ve added your account, use the code generated by the Authy app to activate two-factor code generation back on the original service.

How to use Authy in day-to-day life

From here on out, you can use Authy’s codes to unlock that service for new devices — whether or not you have internet access on your primary Authy device. The app even offers a Notification Center Today widget to give you easy clipboard access to your codes. And if your phone is dead or otherwise occupied, you can also use Authy on your computer via the Google Chrome widget.

The folks behind the award-winning 80 Days gamebook for iPhone and iPad are going back to their roots with Steve Jackson’s Sorcery! series. We got a sneak peek at Sorcery! 3 at GDC 2015, where the fantasy story rolls on, complete with a 3D world map with a literary texture. Every decision is remembered and impacts future events, but there are quite a few new features.

For one, a new timeline feature allows players to zip back a couple of steps if they’re not happy with where the story is going. Not only is this the ultimate in flexibility, it reflects how classic choose-your-own-adventure style books were read. Players now have open roaming on nearby points on the map, allowing a ton of exploration previously limited by your decision path. The big thing are 6 new lighthouses that allow players to peer into and interact with a more prosperous time in the world of Titan’s past. For a closer look at the combat and spell systems, be sure to take a look at our hands-on from PAX East a few years ago.

You’ll want to pick up the original game and Sorcery! 2 to get the full storyline, and have your progress continue on to the third chapter. Keep an eye out for it to hit the App Store sometime in mid-April.

A pleasant surprise from GDC 2015 was Redux Ark, an independent sci-fi survival game. In it, an interstellar crew on a mission to revive the Earth’s failing ecosystem crash land on an alien planet. Not only do you have to find scattered components of your ship in order to repair it, you also have to avoid hostile wildlife, collect specimens to bring back home, and manage a limited battery supply on your space suit.

Redux Ark earns extra points for its low-polygon, watercolor art style. It reminds me a little bit of The Long Dark, but it’s great to see it applied to a new kind of environment. The way your radar and other systems shut down as your battery drains is particularly terrifying. The focus on ecology here is great, and it’s easy to imagine younger players learning a thing or two about the food chain in the process of playing.

It’s still super early in Redux Ark’s development, so the creators don’t expect this in the App Store until late 2016.

The microSD slot may not be as necessary as before, but to some users, it’s still very much a dealbreaker.

Samsung’s announcement in Barcelona that the Galaxy S6 and S6 Edge are not going to have a a microSD card slot or a removable battery was a bit of a surprise to some of us — or maybe just me. We knew that this would break the hearts of many a faithful Samsung user would break at this news, and so this week’s poll was set.