Highly recommended game for fans of any Diablo game, Path of Exile, Titan Quest, Torchlight, Fate etc.
The things that drew me to this game was two things:
1) It has single player (offline with no latency or disconnect issues)
2) Dark atmosphere
Other things that are awesome about this game:
-Grim Dawn developers have paid high attention to details, both visually and also dialogue. Graphics are very nice (although needs optimizing, but that always happens just before actual game release) and dialogue is quite good and sometimes funny as well (serious funny, not childish funny (not that there's anything wrong with that)) and there are no inconsistencies as far as I have noticed such as how Leah in Diablo 3 is powerful enough to open a gate, but the main hero is not, yet can defeat Diablo etc.
-The game is friendly to people with certain disabilities such as sufferers of motion sickness (option to turn off camera shaking) and people with colour blindness (several clolour blindness options to suit the type of colour blindness you have). I cannot tell you how well these options work as I do not actually suffer from these disabilities, but I really like that the developers pay attention to this.
-So the fact that the environments are not randomly generated like other ARPGs worried me a little but they are a large part of what keeps a game interesting for me, but I can assure anyone that the environments do indeed stay fresh because of a number or reasons. There are all kinds of debris that can block your path in one game session, then in a different game session it'll be elsewhere (they vary per game session) meaning you still have to explore the map a little further. There are also many caves/dungeons that are optional but there are many and exploring them does reward you nicely, adding high satisfaction to the gameplay.
-Again, the darker atmosphere of this game is not necessarily scary, but it is indeed gloomy and people who enjoy Diablo will particularly enjoy the atmosphere of Grim Dawn.
-I have not looked too much into the lore, but what I have heard and read about does make me want to look into it further. The idea of the game taking place after a recent kind of apocalypse is always cool and it does make you think of Fallout 3 in that sense. You meet characters in the game who are struggling to survive in the post apocalyptic environment with dangerous monsters (and people) roaming the wilds that were once safe in the past.
-Like a lot of people say, the game is built on the exact same engine that the game Titan Quest (awesome ARPG from 2006 and STILL very good and quite up to date with newer games in every aspect, including graphics). You can easily tell as most of the UI also looks very similar in both structure and art style as Titan Quest. Not only that though, the physics feel exactly like in Titan Quest and the character animation has the same kind of heavy feel to them as well.
-Items. Similar affix system as you get in most ARPGs. Random stats will be applied to each item that you pick up. It's nothing revolutionary, but it's a system that is used in many games because it works and actually manages to keep the game fresh for a while. There are magic items, epic items, legendary items, all that kind of stuff. It's all good though!
-The game has factions similar to ones you see in World of Warcraft. You complete quests for a certain group of people and you increase your reputation with them, making them respect you more and there is a meter in the character menu so you can keep track of it. It's exciting to see what more the developers will do with this as there are a lot of possibilities they could play around with in such a feature.
-Levelling, stats and abilities. Most abilities are cool, but I have not explored it much because I have only played 1 character for about 19 hours as of this review and another small character for less than 1 hour. I can say though that you always anticipate the next level you reach in the game as you get to apply point into stats and also abilities and you do actually feel that your character grows every level. As of this review, the level cap is only 40 which will increase as more of act 3 gets accessible (I think act 3 is the final act..?) but I don't think anybody knows what the max level will be yet but it seems to me that the developers want the game to remain fun and add endgame. They have mentioned on their website that after release they are planning on implementing a game mode where you defeat endless waves of monsters and then you can test how far you get etc, although not much detail has been provided yet.
-Another thing I would like to mention is that the developers do not believe in pay-to-win or small useless DLC updates. However, they do want to create expansions to the game after release (paid expansions such as Lord of Destruction, Immortal Throne, Reaper of Souls etc.) which is awesome really.
-Music is very good.
The developers are very active and update the playable game regularly. Check out their website http://www.grimdawn.com/
for information on the content and features of the game on the Game Guide menu.
Very good game. Happy I contributed to supporting the developers.
EDIT: I would like to add some cons about the game as to not be too biased towards the game.
-So obviously the game needs work on the optimization but that always happens near the end of development.
-Combat COULD improve in a way but is not a large problem. I feel (as a melee character) that not much strategy is involved. My class does not really use energy (mana) and I have never ever run out of it before. A lot of monsters' movement speed is faster than you so you cannot avoid their attacks and it ends up with you using potions. The frequency of using potions is similar to that of Diablo 2, give or take, depending on how much healing your class is capable of. I am okay with this, but I do enjoy the way that in Diablo 3 it is balanced in a different way where potions are an emergency heal with a long cooldown, rather than your main source of healing. Basically the combat could do with slightly more strategy as the only strategy I do is to run away from mobs real quick, heal, then go back but it is far from ruining it. It is a smaller problem than I may be making it out to be. Also it is in beta stage.
-User Interface is not that smooth, but it was not in Titan Quest either but easily forgivable as it is not a huge issue or anything. It isn't unresponsive or anything, just not smooth in anyway, although the placement of the UI during combat or any activity is good and does not get in the way.
Might update this review as time goes on, if I remember ;)