Souldiers is not a souls-like game. It is a difficult metroidvania even on normal mode (Soldier), but I expect much harder in a souls-like game. The easy mode should be enjoyable for casual.

As for the game itself, mechanics and progressions are pretty good. There are character levels, equipment (main weapon, sub weapon, accessories, orb, pockets), consumables. You may need to use extensive consumables for bosses. Puzzles are also enjoyable.

Unfortunately, Souldiers has achievement bugs. It must be annoying for achievement hunters. I realised it after finished Spider Lair. I even tried to beat Iktala in Soldier mode multiple times, to trigger the achievement, but no luck. Other than that, no other bug found.

This review based on progress after finished the first dungeon, Spider Lair. It took me almost 6 hours.