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It's a big collection of tiles that are formatted for ready use in RPG Maker MV but they can be used in any game design engine. There are trains and planes and dirigibles and cars and buildings and statues and treasures galore. Also, this collection gets top priority for updates and expansions, which means you'll have access to new stuff first.
Tiles are 48x48px. Did I mention there's a lot of them? Click the link above to see what's included. Okay, that's it :)