Our Darker Purpose has so much potential - the art style is gothic and frequently impressive, the lore of the Edgewood Orphanage setting is rich, and it has a few unique mechanics in terms of incremental buffs tied in with a leveling system. And it squanders it all.
Our Darker Purpose aspires to be the next Binding of Isaac - it's a top down, twin-stick, rogue-lite with an exhausting array of usable and passive items. But it's worse in every way, and three times more expensive to boot. I couldn't even fathom pouring more than 10 hours into this game, let alone the 100 hours Isaac can satisfy. What it comes down to is gameplay. Signs of sloppy design are on display almost by the minute. The hitboxes of enemies are incomprehensible and your pathetic, pixel-size shots pass through even the largest of bosses for no discernible reason. Movement is imprecise and, without rolling everywhere, is slow and clunky. Everything takes far too much damage before it dies and deals far too much damage, each creature doubling in strength, HP and defense after every level, as opposed to the strict rules governing monster types in Isaac. Difficulty is never an issue if it's fair, but the poor design choices present the challenge as cruelly unfair. A player's skill will never be able to respond to impossible to dodge hazards that appear the instant a player enters a room, or the awkward placement of innumerable indecipherable objects that block player projectiles and obstruct any sense of movement.
In the end, the greatest crime Our Darker Purpose commits is an obvious empty ploy to prolong the length of its campaign. Rather than implement as large an array of items as Isaac or Risk of Rain, encouraging a sense of discovery and experimentation, a lazily implemented upgrade system built around earning 'credits' in a poorly designed menu sets positive bonuses for the next run. A next run that you won't want to make.