Space Hulk: Deathwing

ONLY BUY WHEN AT -75% DISCOUNT
This game in theory has everything a 40k fan can wish for - great visuals, very good sound, perfect premise... yet it fails to deliver, and all just because developers are only looking for a quick cash grab instead of creating a worth wile game that could last and make them money continuously.
Game crashes constantly, AI in single player campaign is the worst I have ever seen, weapons and perks are not balanced, no modding options and devs stopped fixing bugs and caring about this game as soon as sales dropped. Only buy when it costs less than 10€ otherwise you are wasting money.
You can see my full review here:

Not recommending this game would be heresy.
Reasons to buy: BROTHER
Reasons not to buy: You don't have at least 2 other brothers to play it with.
Multibrother is great, singlebrother is meh.

TL:DR It's a great but flawed game, I do recommend it despite the faults.
Let's begin with the bad:
- The tutorial is not nearly good enough to explain the mechanics properly and thus most won't understand how the game is played.
- AI in the game is quite bad, your fellow Terminators need you to hold their hand if they are going to be useful. Enemy AI tends to have problems spawning and spontaneously dying.
- Co-Op lobbies are clunky, not being able to go back to lobby after starting a mission so you have to remake the lobby if you wish to change the difficulty etc.
- After patch 2.44 the game has become a bit unstable, this seems to mostly affect Single Player in my experience.
- XP gains for customising your Terminator are a bit low, would be better if there were occasional double XP events.
- Steep learning curve, some even call it a wall.
The good:
- Atmosphere, simply put it's an astoundingly good looking game detailed and great sound as you make your way through the Olethros.
- Playing with fellow Brothers, this is where the game truly shines. Choosing what class to play and what playstyle you want to use is one of the best aspects of this game.
- Combat, at first glance it's rather dull but after learning the quirks of the combat system it's quite good.
- Customising your Tactical Dreadnaught Armour.
- Purging endless hordes of Xenos
This game is not very well understood and that is partly due to the lack of explanation of how the game works. One of the biggest mistakes is that the tutorial put a small note that Left CTRL is the block button. A small tweak by using block can change the tide of a battle. When using melee weapons turning with the swing of the weapon gives it a bigger arc and you can hit more enemies. Playing solo can be fun at times but is mostly frustrating with Barachiel and Nahum being stuck on the other side of the map as they move with the speed of a glacier.
Going to the community Guides are a huge help and recommendation for those struggling with Deathwing as the guides there are quite good.
In the beginning when first staring out the game was brutally unforgiving and seemed really unfair towards the player. Learning to deal with massive hordes of Tyranids took a bit of time and learning the keyboard shortcuts for AI commands changed the experience quite a lot. Pathing is really important and is something you learn as you play but taking things slow and calmly in the beginning is definitely the best strategy, look at the map and find the best path. Going though a small door to prevent a Broodlord from eating your face is a good idea, just make sure the Broodlord can't find another way in there with you. Not having infinite sprint is frustrating to some as they want to blast through as fast as possible, tapping sprint allows you to sprint for longer and with the Ruthless Perk in Special Missions and MP you can sprint forever.
The Campaign is rather dull with a story that is not very interesting, a 20min autoscroller is not helping. The fun in Single Player is when you start doing Special Missions with randomised objectives and enemies. Going to parts of the Olethros that you otherwise just would have overlooked, now have meaning and some objects you thought were static are actually somewhat interactive depending on the objective.
As for the MP, it's brilliant. Covering the backs of your fellow Brothers as they cover yours is the best aspect of the game. Death is punished quite well with leniency from revives by a Chaplain/Tactical or the completion of an objective. Going to the Deathwing Fan Official Discord to find a group, as well as veteran players that can help you become a master at purging Tyranids, it's something everyone should do.
Lastly is Twitch mode, this is a really fun thing added to the game for those that stream on Twitch that allows chat to buff/debuff or spawn enemies.

Individuals who give this a negative review are to be considered heretics and must be shot at sight, as the Emperor commands.

A visual treat for sure. But the multiplayer is completely dead which is really where the game needs to be played.
Got friends to play with? get it.

Its fun to kill filthy xenos for the God emperor, their heresy is their existence and you get to relieve them of that sin with your redemption.

Brother, get the flamer... The Heavy Flamer.