Chromathud review. Classic Game Room presents a CGR Undertow review of Chromathud for XBox Live Arcade Indie Channel developed and published by Chroma-Team. Chroma, because there's nine colors. Math, because it's full of math. Thud, because gravity acts upon colored blocks with numbers on them. Thus, Chromathud. It's a block-centric puzzle game in the vein of Puzzle League, where a stack of blocks rises constantly and must be prevented from reaching the top of the screen, by choosing numbers from within the stack to total a target sum, thus eliminating them (and potentially chaining other reactions down the stack for bonus points and more breathing room). This video review features video gameplay footage of Chromathud for XBox 360 and audio commentary from Classic Game Room's TJ.