I've been playing Crimsonland pretty much since its original release, and it was a total time killer at the time. Obviously, I was quite hyped when I heard about the updated version on Steam. And I have to say that I am quite disappointed with it.
The HD graphics are just... meh. Sure, it is in high resolution, and new level backgrounds look nice, but everything else looks like garbage from year 2000. Really, the old version just had better overall design. The new monster graphics are ugly, the weapon icons are beyond any recognition, and the new UI is not just ugly, but it is also less usable. It is virtually impossible to determine how much of your Shield is left when surrounded by enemies, and it is also very hard to determine the exact time left in reloading (why not just leave the clear and accurate "clock" from the old version?).
The game is now released on many platforms. Usually, there is nothing wrong with that, but for Crimsonland it meant that some content was removed because it was unusable on consoles. I really miss the Typ'o'Shooter mode, and some perks like Pyrokinetic and Evil Eyes.
Speaking of perks: the new Telekinetic is just garbage. Instead of allowing you to hover the crosshair over the powerup and wait for a few seconds, ALL powerups are now gravitated towards you even when you really don't need that. Ever wanted to lose the game because a mysterious force made you pick up the Blowtorch? Well, now you can. Say thanks for consoles for one more butchered PC game.
I was also really disappointed by having perks disabled in Quests mode by default. Sure, one can say it is more challenging that way, but I've always perceived Quests as an extended tutorial for Survival mode, where player unlocks the perks and tries them out. Without the perks, the difficulty becomes just absurd on Grim, and the luck factor starts to account on your success way more that your skill. Why not just make an achievement for finishing the game without the perks? I believe that'd have been the best of both worlds for both hardcore and usual gamers.
Some quite significant changes to the game balance were also made. And while I appreciate the new way Fire Bullets powerup works, I will never understand why rockets weapons are THAT powerful now, and why the almighty Splitter Gun is reduced to a useless garbage when compared to the old one. Still, the balance is better than it was in general, I think.
I really dislike new Survival mode. You can barely get 6-9 levels if you are really good (and lucky), and that really limits your chances of survival. The game session is also much shorter now, as monsters gain power and health much quicker than before. I miss the old epic 1+ hour battles.
Online highscores are implemented really well and provide a lot of additional info that helps to identify cheaters.
In conclusion, Crimsonland is still a fun game. Not as fun as the old version for me, but if you are new to Crimsonland - just wait for the sale and go grab it.