A few buyable items:
a normal sword - Melee
decent sword that does decent damage with decent range, starter weapon
PARRY - Melee
This item is from Grace, and it isn't an actual item, rather it gives you a button you can press that parries anything that hits it during the short duration, it also does good damage and a short cooldown. The catch is that Shame is always chasing you down and instakills you if he catches up.
Black Knife - Melee
Deltarune reference that has good range and damage, but a hefty cooldown. If you do 300 damage with it, you can use a SWOON ability that does very big damage to anyone in a small radius.
a normal gun - Ranged
decent gun that does decent damage with a decent ammo count, starter weapon
Gamblers Pistol - Ranged
A Forsaken weapon that is essentially Chance's gun but used for an actual fighting game. It has a slow fire, one ammo, slow reload, poor range, and a 40% chance to explode and deal self damage. However, it deals VERY high damage if it lands. Also the explosion deals damage if you're close to the user when it explodes.
Laser Cannon - Ranged
Reference to Outcome Memories, it has to charge up before use, slowing you down, but once it does it fires a powerful blast that melts through most things it hits.
a normal medkit - Consumable
decent medkit that helps a decent amount with a decent amount of uses, starter weapon
Butterscotch Cinnamon Pie - Consumable
Undertale Reference, an instant full heal on use, only issue is that it only has a single use, and no other benefits.
Fur Potion - Consumable
Reference to those weird furry infection games. 9/10 of instant death. 1/10 chance of turning into a jacked beast with an OwO face that violently tears apart anything in its way.