Completionist

Iconic

Found 1 of the 21 congruences that is this shape

Common

Cool C!

Found this neat shape. Surprisingly, it's not a solution

Elephant?

Found all 25 congruences available in the Demo

Vertical slice

Found all 28 congruences with this pentomino

X marks the spot

Shape rotator

Mentat

A simple, yet difficult puzzle game. Manipulate two pairs of pentominoes to form combined shapes with the same outline. There are 513 different solutions.

<h2 class="bb_tag" style="text-align: center">You are given two pairs of pentominoes</h2><p class="bb_paragraph" style="text-align: center"><span class="bb_img_ctn"><picture><source srcset="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3455870/extras/d64d5e6f79b766e36e6ce2abcda89c4e.webp?t=1756996293"><img src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3455870/extras/d64d5e6f79b766e36e6ce2abcda89c4e.poster.avif?t=1756996293" class="bb_img" width=780 height=199 /></picture></span></p><h2 class="bb_tag" style="text-align: center">Combine them into two shapes that have the same outline</h2><p class="bb_paragraph" style="text-align: center"><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline crossorigin="anonymous" poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3455870/extras/7d43c5d674833c6fdde883dfec6efbb6.poster.avif?t=1756996293" width=780 height=244 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3455870/extras/7d43c5d674833c6fdde883dfec6efbb6.webm?t=1756996293" type="video/webm; codecs=vp9"></video></span></p><h2 class="bb_tag" style="text-align: center">For an extra challenge, there's an option to hide the outline until you find it</h2><p class="bb_paragraph" style="text-align: center"><span class="bb_img_ctn"><picture><source srcset="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3455870/extras/3831cc6d92e2e39dad87b419cb221cc8.webp?t=1756996293"><img src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3455870/extras/3831cc6d92e2e39dad87b419cb221cc8.poster.avif?t=1756996293" class="bb_img" width=780 height=69 /></picture></span></p><p class="bb_paragraph" style="text-align: center"></p>

Good Game Database

Congruence Achievements