Hellblade : Senua's Sacrifice is an essential modern gaming experience, though, there are a few things you need to know before starting.
1. This is a game where immersion means everything. The audio quality is second to none, but headphones are a must, and to better appreciate the experience, you'd rather be ready to dive a few hours into it rather than play for 30 minutes and stop.
2. It takes a bit of time to get used to the game, who slowly introduces you to its mechanics. The start could even feel boring as you're not yet fully immersed into its world, and the early puzzle mechanics are dull. Don't give up, it's getting much better quickly.
3. This is not a game about fighting, and even though sword fights are part of the journeys, they are not the destination.
4. The game is short, can be finished in about 6 to 15 hours depending of how fast you solve the puzzles, and how much you rush the experience. I wouldn't advise you to rush it though.
Once you have understood those few rules, immersing yourself into the world of Sennua is one of the most pleasing experience one can have. The sound stage is outstanding, there are smart idea everywhere, and those voices in your heard make a great job at both tricking and helping you. The UI is minimal, nonexistant even, and everything is delivered to you through sound and environment clues. That is superb. Even though not its main selling point, the fighting bit in Hellblade is pleasing, with a few great moment, though it does fighting more than one opponent not the greatest part of its package.
The graphism as well as the art direction are superb, and you'd be hard pressed believing they achieved that with only a small team.
In conclusion, I believe this game needs to be in any serious gamer's library. It's a 10 hours experience, with limited replayability, but will provide great moments of gaming. On top of that, this is on GoG, DRM Free. What are you waiting for ? buy it !