Yeah, definitely awesome!

AB5 v2 will have a new minor gameplay mechanic known as "retreat mode". This was introduced later in the original Team 17 series, and I figured it would be cool to implement.

If you're facing an oncoming pack of aliens and you want to attack them but you also want to get some distance between you and them at the same time, you can now slowly walk backwards whilst firing. To do this in-game, hold down the ALPHA key whilst walking & firing, eg. if you hold down ALPHA RIGHT, you'll be walking to the right but still facing to the left. You can press 2nd to fire off some rounds at incoming enemies whilst backing away from them. The catch is that when you retreat backwards, you only walk half-speed.

Previously the ALPHA key was used for accessing Intex terminals and activating fire doors, but this function is now mapped to the X,T,O,n key.

Okay, I'm a bit late, but this looks really cool.
Will it also support USB or will it only work with the I/O cable? USB would be awesome since most people that have an 84+ don't have an I/O cable.

HOLY SHIT THIS IS AWESOME

i'm glad to see updates on this, this is probably going to be POTY 2014

That is awesome, nice to see updates on this indeed!

So [Alpha] is essentially a "strafe" button?

Pretty much yeah, although you can only strafe backwards, not side-to-side.

Okay, I'm a bit late, but this looks really cool.
Will it also support USB or will it only work with the I/O cable? USB would be awesome since most people that have an 84+ don't have an I/O cable.

There is no support for USB linking at this stage, perhaps in the future though. I still need to work on getting the I/O linking to sync correctly on hardware; it works fine on WabbitEmu but on actual calculators it tends to drop out a bit, although I haven't tried it again for a while. I've been working on other features such as the retreat mode and more - I'll get back to tightening up the linking soon.

Something that has become common in games today is having "achievements". Team 17's PS3 version of Alien Breed even has achievements, so now Alien Breed 5 will also have them too!

At this point, I have 15 achievements coded, split into 3 categories. Some are simple to complete and some are a little harder. They'll each have their own little title and description, eg. "BY HOOK OR BY CROOK" is obtained by defeating a boss using only the machine gun (the weakest weapon).