i've installed everything properly, and other games work, but this game doesn't. could anyone tell me how i can fix this?

How can I reliably unlock this character? Which weapon exactly needs to be used? What things void the unlock?

hi, being a roguelike conniseur or however its spelt i have a few recommendations - Health orbs spawn less and heal less - Enemy health/damage/speed scaling (if it doesnt exist already) - Upgrades more often (Keeps stimulation going, more playtime) - Difficulties (easy, medium, hard, absolute hell) - Changes (like gun choices or circle colours as cosmetic) good game n all...

help

or do I need money?