just finished the game after 2 years, I believe you need extra motivation after the second boss 'the sister" one of my only motivation at one point was the fact surge 2 is out and it looks good.
at first glanced the surge is great and the targeting system is the greatest thing a dark souls dont have. I like the risk you take when the more you kill without going back to the 'hub' the more scrap 'xp' you get to gear up or to level up,
if you die you have 2min to pick up the orb like dark souls, so hurry up or kill enemies to increase timer.
5 bosses isnt much compare to other games but the built up to the bosses is great and intense, and 5 was enough
the big but for me is after the 3rd boss, hallways got smaller lots and lots of hallways for shortcuts but also felt like all i did was run and hide to hallways because thats mostly what was left of the game
also enemies got very strong at some point whent from easy to medium then after the 3 boss, it just got complicated.
got from medium to extra hard I even back track because I thought it was too hard, and to my suprised the hard guys were released everywhere in the game...
1 enemy couldnt kill for the love of god, had to google it, just to know when he gets backup got to get very close to it and overcharge it, knowing 1 hit kills you..
same for the final boss, I actually thought the final box was easy exept when half way had to over charge something with 5 sec window bfore he kills u..
but after hours and hours, i beat it and cant wait to finish the surge 2