Thank you. I'm going to my grandma's house over the weekend and she has a 2 mBit/s connection and lives in the middle of the countryside. Some games have trouble running out there(Black Desert for example was unplayable), but I didn't know how well SoulWorker would do.
Yep, i just did a manic run on my level, untill boss it was easy as balls, the boss fight was unplayable - i kited him for 10+ min as Haru using 3 ranged abilities on high cooldown... but i won.
2MB/s should handle this game easily, i guess that 256KB/s would be enough to play it without noticable delays.