In the add-on, the player takes control of a small group of soldiers sent to rescue targets from an overrun city. They quickly establish a small base, and then it's up to them to perform supply and rescue runs while waiting for the chopper to come back at various intervals. It's a great idea and since it offers all-new characters and an all- new map, I couldn't have been more excited. However, it was incredibly frustrating and unpleasant for a number of reasons.
Speaking of stupid, the soldiers on your team are little better. At one point I was being chased and ran back inside my base. I was low on health and out of ammo, and I ran inside thinking that the rest of my troops would come to my aid, but I couldn't have been more wrong. The zombies chased me inside the gates with none of the guards stopping them, and as I was getting torn apart in the middle of my encampment, two guards stood watching without lifting a finger.
This moronic AI wouldn't be so bad if the difficulty wasn't so high, but compared to the base game, it's a lot tougher, and it doesn't often feel very fair or sensible. For instance, I was searching a small warehouse, and after sweeping the area to pick off a few stray zombies, the coast was clear. I went inside to search for goods, and five seconds after I started searching, a horde of zombies flooded in through the back door. My partner and I took them out, but just as we were finishing the first group, a second wave came in. We polished those off, and then a third group came in. Keep in mind, this area had been totally clear before we started our search, so the zombies were appearing out of nowhere. We got overrun and both of my characters died despite taking measures to prevent such a thing from happening. Similar events are quite common, with waves of zombies appearing at high frequency and in great numbers. I get that there are some SoD fans who constantly want the game to be harder, but honestly... fuck them. In my opinion, it's already tough to deal with, and as it stands, it's scaled too high.
There are other things that are problems like not being able to bring more than one soldier for backup despite the fact that the game can easily handle friendly groups of 3/4, or the absurd length of time it takes to reload a gun. I'm no soldier myself, but Lifeline has the longest reloads I've seen in any game in recent memory, and losing characters because they’re taking an hour to pop in a clip is rubbish. I still love the base game and I'm absolutely still a fan of Undead Labs, but this Lifeline expansion was entirely too frustrating, and I hope that they patch it to a place where ridiculous zombie spawning and brain-dead AI doesn't kill the fun.
The final made-me-frown game is Abyss Odyssey, recently released by Atlus. Like the other two, it’s so close to being something quite cool, but it just doesn’t quite get there.