Heyup folks! While developing my game I had need of a flexible grid-based inventory system similar to Diablo II's. Sadly, I couldn't find anything ready made in the asset store that met my needs so I had to roll my own. It has finally hit the asset store and you can find it here
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[RELEASED] Power Grid Inventory: Diablo II style inventory
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[RELEASED] Power Grid Inventory: Diablo II style inventory