It's a good, bordering on great game. The attention to detail is excellent, as always, with a great variety of weapons, and a skill tree put in for good measure. The RPG elements, if simply, add that extra layer of depth to keep the game engaging. The story also kept me playing till the end.
However, the game is very buggy and at times feels unfinished. This is understandable given its size and scope, but now at one point the my character is unable to move and this doesn't change no matter how many times I reload the save or restart the browser. Also, the game experiences some slowdown and other glitches that don't make it feel as polished as it should be.
These are only technical issues though, as the quality of the gameplay is enough to warrant this a thumbs up from me. Some other elements feel half-baked, like the buddy system, sidequests, and exploration, but all in all, a step forward in the series.