A lot more fun than the 1st game but good and bad choices usually make no sense.
The one thing i found strange about the bad Carma from a story point of view is the story doesn't work. Because if you go on a killing spree, killing everyone in sight, how is that better than the monster? I think this because, ok you kill the monster but your the new one so how have things improved?
Ok now for the game play. The 1st thing i noticed was the melee attacks. Instead of the 3 punch combo moves you have a tuneing fork looking thing for blunt force electrical trauma. You have the basic 3 hit combo but each hit charges up a special move meter. Basically its a stronger hit that kills the weaker enemy's in 1 hit but you can upgrade it to a more powerful finishing move. There's about 5 different moves and each 1 looks very painful like, grabbing a guy by the head with your weapon, spinning around him and slamming him head first into the ground. Now its tempting to run strait into a group of guys and just beat the heck out of them, don't do that. They die easy but so do you. You can get away with doing that to 2-3 guys but anymore and your Swiss cheese. This forces you to be creative when engaging enemy's. Its harder than the 1st game but its actually quite fun. The ability's are essentially the same as the 1st game, with a few added ones of coarse. They added variations of each ability. for example, You have grenades and you can switch to sticky bombs or cluster bombs. You have to unlock each one by completing the requirements for each variation when there available. You do this by doing stunts like head shots, enviro take downs and stuff like that. There's still upgrades but nothing like the 1st game. you still use exp but mostly just to buy the variations and its so easy to get exp its never an issue to get it. even with all the ability variations i ended up only using a handful of them.
The enemy's were a lot more dangerous and interesting. The 1st enemy type isn't anything special just your basic rifle, rpg shotgun guys and shield guys. They added 2 more like snipers and Gatling guns. After them it get nasty. You have monsters and your not quite sure if there human ether. They get progressively worse and what you run into doesn't seem human at all. Then you have solders with ice powers. There basically like the 1st type but if you try getting close to them they'll use an ice pillar to jump away from you. So there hard to melee and hard to run from. The most dangerous of the ice guys is the shot gun guys. not only do the have shotguns but there extremely aggressive. They run at you like a velocarapter and use there ice powers to go faster so you really cant run from them.
The blast shards weren't nearly as annoying to get since they glowed purple and your map showed which way to the nearest shard.
Good game no major glitches i can remember, the only bad thing is it gets kind of monotonous trying to get everything.