Seej: a 3D printed, free real-world tower defense game

Zhreng3's Seej is a free/open 3D printable tabletop war-game, a real-world tower-defense game you print and play at home. Seej's players come up with all sorts of innovations that are integrated into a constantly updated set of free designs.

The proliferation of inexpensive filament printers with smaller build platforms requires the advent of a smaller Seej engine, so I’ve added the Marshmallow Mangonel to the kit.

The classic catapult gets improvements inspired by community feedback, too. It’s all compatible with older prints, and is much, much more accurate.

Seej is an Open Source tabletop wargame designed to advance the state of 3d printing through competition and player-directed evolution. Rules for Seej are at

Seej Starter Set, 2013 Edition (via Wonderlandblog)

Notable Replies

  1. Anyone else remember the game this is ripped off from. "Crossbows and Catapults" I miss that game . . .a lot.

  2. Yep, I came here to say that very same thing. We used to put a ton of rubber bands on the catapults and wrap them around several times until you could throw a puck across the room (and dang near embed it into the wall). Good times smile

  3. I think this is a great idea. Crossbows and Catapults is still made under the name Battleground, but it's horrendously expensive. Vintage ones on ebay aren't much better. Now if you (or a friend) has a 3D printer you can make your own set for a few bucks.

  4. Our game ended abruptly one day when the quadrupled rubber band strength shattered the crossbow frame and sent shrapnel flying through the ranks of both sides. Good times indeed.

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