Not Not 2 - A Brain Challenge

The classic challenge gets a visual boost.

<h2 class="bb_tag" >With this DLC you'll NOT NOT unlock:</h2><ul class="bb_ul"><li>3 unique skins for your characater</li></ul><img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3732080/extras/79cf394f4109447b80e9cd716ff8dd14.avif?t=1757581120" width=249 height=211 /><ul class="bb_ul"><li>3 cool backgrounds for a change of scenery </li></ul><img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3732080/extras/74a07f94899217efcf35d18479fc8465.webp?t=1757581120" width=234 height=57 />Even mind games enjoy a splash of color

Good Game Database

Not Not 2 - A Brain Challenge: Golden Achievements