69%Strong matchDungeon of the ENDLESS™
88%9k88% positive reviews, Very Positive across 9k reviews·Roguelike · Tower Defense
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Become Romby, a tiny crystal lost in space! Survive and defend the crystal against dark waves by upgrading crazy weapons, planting strange flowers, and using tarot cards. Explore constellations, defeat bosses, and unlock over 100 unique skills.
Rombykon
SteamDefend the crystal against increasingly chaotic waves of enemies. Every foe matters and every decision counts: if the crystal falls, darkness will consume the cosmos. Use your wit, your weapons, and your flowers to survive. Explore, grow stronger, and prepare yourself to reach wave 100… if you can.

From a flamethrower trumpet to plush toys stuffed with dynamite. Every weapon is unique and comes with its own mechanics. Level them up, evolve them, and change how they behave — the more you use them, the more devastating they become.

Plant and discover flowers with unique effects: generate resources, poison enemies, heal, grant experience, or activate worker bees that automate everything. Protect your garden… enemies will come for it too.

At the end of each round, choose one tarot card out of three options. Gain temporary powers that alter the gameplay and combine up to two active effects to adapt to every situation.

Unlock a massive skill tree that upgrades Romby, your flowers, and the environment itself. Choose freely and in any order you like.

Travel through space and uncover constellations filled with areas, secrets, enemies, bosses, and powerful rewards. Every zone is unique and plays a vital role in upgrading Romby and their arsenal.

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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