Illustack

Illustack combines classic Tetris block placement with roguelike tower climbing. You rotate, stack and clear blocks to build a stable tower across multiple levels, using equipment and bonuses to trigger chain reactions and break through the realm limit.

Tower-climbing challenges

Random block generation, accumulating level challenges and combo streak bonuses shape each climb, so every run is different. High scores can appear on a leaderboard where you compete with players around the world.

Themes and music

You can unlock more than ten level themes, including cyber neon, deep sea abyss, glitch data, vaporwave, black gold rock and exotic rainforest. Switching styles changes the visual, auditory and gameplay atmosphere. The custom soundtrack spans multiple genres, including sunset City Pop, cyber neon electronics, black gold gothic rock, South American rainforest beats and bamboo forest zen.

Controls

The game supports mouse, keyboard and controller controls.