During pre-game customisation, choosing a healer class such as medic, witch doctor or chemist for either Banan or Chris (after you unlock his customisation ability). You cannot guarantee getting any healer character for your squad, and failing to get one can make it extremely hard to progress in the story. This healer will also be your intelligence sink character as that synergises well with the healing bonus buff intelligence gets.
Using the heavy infantry or shielded soldier class in the slot nearest the enemy. That slot has to tank a lot of damage and can't dodge well, so it makes sense to invest in a brick wall character to soak the inevitable damage.
Once you get a good 4 man team up and running and can afford to keep them healed up with medicine the only thing stopping you from continuing to use them is the energy mechanic, and that can be overcome easily most of the time. Unlike other rougelike or tactical squad games such as X Com Enemy Unknown, there's no surprise or hidden missions that stop you from using your main group, force you into using lesser used characters or that require you to use more than four characters.
Getting your hands on as many Supply Usage bonus equipment pieces as possible and ensuring everyone including heroes not in your combat team have them equipped. That buff isn't flashy, it doesn't help you in combat (although some equipment will have more than one trait on them), but lack of supply is the easiest way to lose a run through. You burn through revolutionary morale as a replacement currency if you can't afford to feed your heroes, and paying for the medical treatment in your home base it is also the only way to heal injuries if you don't have any medicine available.
Demonic Spiders: Enemy engineers that summon drones. Just as your engineers can carry your whole team, an enemy engineer can single-handedly wipe the floor with your team. Their freeze drones will make it virtually impossible for your team to attack while the attack drones whittle away their health. And there's no limit to how many drones they can summon.
Even Better Sequel: The first game wasn't poorly received by any means, but the second is a significant upgrade, with more depth, more features, and in particular, improved graphics & UI design which makes it look less like a simple mobile or flash game and more like a typical indie PC game.
No Casualties Run: Hard, and more so the higher difficulty you select. It is all but impossible to make a run like this if you consider characters who get sent to the frontline to count, because it is inevitable that they will die and you have no control over how long they will last.
Fan-Preferred Couple: Banan/Chris, with a side note of adopting Maria and taking care of her.
The serial killer has wickedly dangerous skills that combine with a morale boosting effect that can see annihilate enemy groups on their own. They are also likely to be incredibly dangerous with their machine gun.
One of the classes can summon combat drones over and over, and they will eventually overwhelm any opposition team.
The inability to split out or filter the inventory to only see specific equipment types (ie, only light armor, only pistols), or find items with specific abilities. The inventory also can't be set to stay on a single sorting type, which can be annoying since sorting by DPS for weapons, and Defense value for armour is vastly more important than sorting by value, rarity or level.
You can't sell non-weaponry truck upgrades. There is also a bug where you can leave the truck window, go back, and see a sale button on the truck upgrade page, but if you click it, then try to sell, it will actually install, which can cost a large sum of cash & swap your useful item for a lesser one.
The Woobie: Maria is a little girl who is rescued by the heroes after her parents are seemingly killed during an attack by the Government forces. She doesn't talk much but becomes helpful by cooking food for the team.
