Here is the full change log from the update that went out yesterday.

• Implements a co-op campaign mode! Team up with up to 3 other Dudes and fight your way through even harder levels than you’ll find in the single player campaign. No friends? Match up with random Dudes online, or add some moronic clown bot allies to your game to help you out until some real players show up.
• Improved gamepad compatibility! Added an advanced Gamepad Settings menu where you can tweak everything about the gamepad that they’ll allow us to. You can also open up an analog test screen which will show where your sticks are pointing. Fixed all kinds of crashes. Crashes suck. We hate ‘em, you hate ‘em. Hopefully they’re all gone now.
• Who wants some cheat codes? Use the text chat feature (T by default) to enter cheat codes during single player mode. Keep an eye on our Twitter for cheat codes, or you could maybe try some of the old P1 codes and see if any of them work… No cheating achievements though, gotta do those the hard way.
• We fixed the Rampage mode scores. Now you’ll have to be REALLY awful to get an F. That A+ is still going to be a challenge to get, so make sure to keep that multiplier going, switch up your weapon every now and then, and don’t forget those executions for bonus points!
• We also fixed up a lot of the maps. There was some weird stuff going on with collisions so we went ahead and got rid of them for you. Now you can fling molotov cocktails with reckless abandon!
• The sound effects are improved on most maps as well, we went back and turned off the “Use Muddy Sound Effects” feature. Not sure why that’s toggled to On by default.
• The exit signs were a bit confusing so we put arrows on them so you know which way to go. You’re welcome.
• Tweaked the audible range and frequency of certain dialog lines, because some of them just weren’t playing at all and that’s no fun
• Improved variety of animations of many NPCs
• Intro movie is now quieter. “I’m afraid you’re just too darn loud.”
• Intro movie now plays at the correct saved video settings, because why wouldn’t it
• Fixed that annoying “dotted box” problem in the menu which hijacked the gamepad input
• Resolved various issues with the mouse cursor during gameplay and menus
• Speaking of menus, we fixed a lot of problems with them. Like the mouse doing weird stuff like moving to the corner randomly. And other weird ♥♥♥♥ we probably forgot about. Hey, it’s not like we can be ♥♥♥♥♥ to remember every single little fix we made, right?
• We also made the bullet icon in the menu shiny and spinning, because it’s 2016 and we can do cool ♥♥♥♥ like that in a retro-styled menu
• Game now pauses automatically if the Steam overlay is opened
• Added more loading screens, so you know when you’re loading and you know when you’re not
• Fixed a problem where certain enemies would stare off into space. We don’t quite know what they were looking at, but be careful because they’re more likely to be looking at you now.
• Fixed the barrels not spinning when exploded on certain maps, because it was weird as hell to look at. Maybe that’s what those enemies in the above bullet point were staring at.
• And a bunch of other ♥♥♥♥ we forgot about. See if you can find them yourself. It’s like an adventure!

Here is the full change log from the update that went out yesterday.

• Implements a co-op campaign mode! Team up with up to 3 other Dudes and fight your way through even harder levels than youll find in the single player campaign. No friends? Match up with random Dudes online, or add some moronic clown bot allies to your game to help you out until some real players show up.
• Improved gamepad compatibility! Added an advanced Gamepad Settings menu where you can tweak everything about the gamepad that theyll allow us to. You can also open up an analog test screen which will show where your sticks are pointing. Fixed all kinds of crashes. Crashes suck. We hate em, you hate em. Hopefully theyre all gone now.
• Who wants some cheat codes? Use the text chat feature (T by default) to enter cheat codes during single player mode. Keep an eye on our Twitter for cheat codes, or you could maybe try some of the old P1 codes and see if any of them work No cheating achievements though, gotta do those the hard way.
• We fixed the Rampage mode scores. Now youll have to be REALLY awful to get an F. That A+ is still going to be a challenge to get, so make sure to keep that multiplier going, switch up your weapon every now and then, and dont forget those executions for bonus points!
• We also fixed up a lot of the maps. There was some weird stuff going on with collisions so we went ahead and got rid of them for you. Now you can fling molotov cocktails with reckless abandon!
• The sound effects are improved on most maps as well, we went back and turned off the Use Muddy Sound Effects feature. Not sure why thats toggled to On by default.
• The exit signs were a bit confusing so we put arrows on them so you know which way to go. Youre welcome.
• Tweaked the audible range and frequency of certain dialog lines, because some of them just werent playing at all and thats no fun
• Improved variety of animations of many NPCs
• Intro movie is now quieter. Im afraid youre just too darn loud.
• Intro movie now plays at the correct saved video settings, because why wouldnt it
• Fixed that annoying dotted box problem in the menu which hijacked the gamepad input
• Resolved various issues with the mouse cursor during gameplay and menus
• Speaking of menus, we fixed a lot of problems with them. Like the mouse doing weird stuff like moving to the corner randomly. And other weird we probably forgot about. Hey, its not like we can be to remember every single little fix we made, right?
• We also made the bullet icon in the menu shiny and spinning, because its 2016 and we can do cool like that in a retro-styled menu
• Game now pauses automatically if the Steam overlay is opened
• Added more loading screens, so you know when youre loading and you know when youre not
• Fixed a problem where certain enemies would stare off into space. We dont quite know what they were looking at, but be careful because theyre more likely to be looking at you now.
• Fixed the barrels not spinning when exploded on certain maps, because it was weird as hell to look at. Maybe thats what those enemies in the above bullet point were staring at.
• And a bunch of other we forgot about. See if you can find them yourself. Its like an adventure!