Balancing My Growing Board Game Collection with Limited Shelf Space

I've recently gotten really into board games, and my collection has surprisingly grown faster than I expected. The problem is, my small living room only has this one low shelving unit that was originally for books and decor, and it's already jam-packed. I tried stacking some games horizontally to save space, but it feels cluttered and makes it hard to see what I have. I also thought about using under-sofa storage bins, but the games vary a lot in size and shape, so nothing fits neatly. Ideally, I want a system that keeps the games accessible for spontaneous game nights but doesn’t make the room feel cramped or messy. Has anyone found clever ways to store a diverse board game collection in a small space without sacrificing easy access? Are there types of shelving or storage units that work better for oddly sized game boxes?