Wizard.io is a free top-down horde-survival action game built in HTML5 using Unity WebGL, playable directly in any modern browser on desktop and mobile.

Developed by Onki Games, it puts you in arenas full of mystical foes where you cast elemental spells, collect orbs to level up, and fortify a home base between runs. Despite the ".io" name, it is a single-player survivors-style action title rather than real-time multiplayer.

The hook is the spell-synergy loop. You move a wizard through a 2D top-down arena while spells auto-fire on cooldown, you sweep orbs that drop from defeated enemies to gain levels, and each level-up presents a choice of new spells, upgrades, or perks.

Survive a wave, beat the boss, return to your base, and spend rewards on permanent upgrades and artifact unlocks. The Android release shipped in December 2023, with iOS and the WebGL browser build following in March 2024 and the last verified update in October 2025.

It suits players who enjoy short-session survivors-like runs where build choices matter more than reflexes.

To play Wizard.io, move your wizard through a top-down arena while elemental spells auto-fire at incoming monster waves, then pick up the orbs enemies drop to gain XP and level up. Each level-up offers a choice of new spells or upgrades.

Survive each wave, defeat the boss, then spend rewards at your home base for permanent upgrades. Each run plays out in a single arena.

Enemies pour in from the edges in escalating waves, your equipped spells fire automatically based on their cooldowns, and your only direct job is to position the wizard so attacks connect and incoming damage misses. Orbs dropped by killed enemies act as XP.

Pick a few up and the level-up menu pauses the action with three options — a new spell, a rank-up of an existing spell, or a stat perk. Choices stack into builds across the run.

When a run ends, rewards convert into upgrades for your home base: stat boosts, new spell unlocks, and artifact slots. The base is the meta layer that makes later runs easier than your first.