Defend your base against waves of AI robots. No download needed.
Humans VS AI.IO is a unique free browser tower defence game that turns the world's most famous AI models into robot enemies you must defeat. Instead of generic alien invaders, you face waves of machines named and designed after real AI platforms: ChatGPT, Claude, Gemini, Grok, Mistral, DeepSeek, Perplexity, Copilot and Meta AI. Each bot has abilities inspired by what makes its real-world counterpart distinctive — Claude heals nearby allies just as Claude models excel at long-context reasoning, Grok jams your turrets, and Gemini zigzags unpredictably. The concept transforms the current AI landscape into a strategic battlefield, making Humans VS AI.IO the first tower defence game where you literally fight back against artificial intelligence. Available entirely free in your browser at humansvsai.io with no download or account required.
Start by selecting a difficulty and map. Once the game loads, you have a brief window before the first wave to place turrets on the grass tiles bordering the enemy path. Click a turret in the arsenal panel on the left, then click a valid grass tile to deploy it. Each turret costs gold — you begin with between $300 and $500 depending on difficulty. Use the NEXT WAVE button in the bottom-right to start each wave on your own terms.
As enemies are defeated they drop gold, which you can reinvest in more turrets, upgrades, or soldiers to fight on the road. Turrets can be upgraded up to three tiers by clicking them during a wave — upgrades unlock powerful bonuses like piercing shots, area-of-effect blasts, and chain electricity. Mid-game you unlock special abilities: Firewall slows enemies by 65%, Virus Bomb destroys shielded units, and Beacon doubles your fire rate for 10 seconds. Manage your gold carefully, prioritise threats, and adapt your layout as new AI enemy types appear.
The standard heavy enemy and first boss-tier unit. ChatGPT bots are durable with high HP and plough straight through your defences. They appear in the early waves and keep appearing throughout, increasingly armoured in later rounds. Target them early to prevent a flood.
Claude bots are support units that continuously heal all nearby enemies. Their healing aura makes adjacent robots far harder to kill. Counter them immediately with Rocket Turrets for area suppression, or they will undo your damage fast. They are especially dangerous in tight formation waves.
Gemini bots move in a fast unpredictable zigzag pattern, making them hard to hit for slow-projectile turrets. Laser and Sniper Turrets are the most effective counters due to their instant-hit mechanics. Gemini bots start appearing at mid-game and become more numerous in later rounds.
Grok bots can jam your turrets, disabling nearby weapons for a few seconds. They are immune to EMP stun, so you cannot freeze them the same way. Keep an EMP Turret in range — EMP turrets are the only ones immune to Grok jamming and will continue firing while your others are offline.
Mistral bots are stealth enemies that appear semi-transparent and take only 50% damage from turrets unless fully revealed. Place a Radar Tower or EMP Turret to expose them. Once revealed they receive full damage and become visible to all weapons. They are the primary reason to invest in a Radar Tower.
DeepSeek bots regenerate health after not taking damage for three seconds. They punish gaps in your coverage — a robot that passes through a dead zone will emerge with full HP. Virus Spikes on the path disrupt the regen cycle. Maintain consistent fire coverage across the entire route.
Perplexity bots carry heavy armour that reduces incoming damage significantly. Standard turrets are much less effective against armoured targets. Use the AP Rounds upgrade (unlocked at wave 10) to reduce the armour penalty, or tier-3 AP Rounds to bypass armour entirely on every shot from every turret.
Copilot bots are fast-moving support units that fly alongside other enemies and boost the movement speed of nearby robots. They can turn a wave of standard units into a rushing swarm. Prioritise killing Copilots quickly — their death removes the speed bonus from all allies they were buffing.
Meta bots generate temporary shields on themselves and nearby allies, absorbing incoming damage before HP is reduced. EMP Turrets immediately strip these shields on hit. The Meta bot also has a shield cooldown mechanic — EMP clears shields and blocks them from reapplying for 5 seconds, giving your other turrets a window to deal full damage.
Humans VS AI.IO features eight distinct turret types, each serving a different role in your defence strategy. The Basic Turret is your starting workhorse — cheap, reliable, and upgradeable with piercing shots. The Laser Turret deals instant-hit continuous damage, excellent against fast Gemini zigzaggers. The Sniper Turret (unlocks wave 5) has extreme range and armour penetration, ideal for high-HP targets. The Rocket Turret (unlocks wave 3) fires slow homing missiles with area-of-effect splash, suppressing Claude healers. The EMP Turret (unlocks wave 3) stuns and chains to multiple enemies, strips Meta Bot shields, and is immune to Grok jamming. The Tesla Turret (unlocks wave 7) chains devastating electricity between clustered enemies. The Radar Tower (unlocks wave 2) reveals stealth Mistral bots and gains Target Lock and Signal Jam upgrades. The Jet Fighter delivers powerful airstrikes anywhere on the map.
Recruit Mode is the entry point for new players. Enemies move at reduced speed and have slightly lower HP, giving you more time to plan your turret placement and learn the mechanics. You start with $500 gold, the highest of any mode. The 35-round structure means there is a clear endpoint, making it ideal for understanding how waves escalate and which turret combinations are most effective. Recommended for anyone new to tower defence games or to Humans VS AI.IO specifically.
Agent Mode is the standard experience and the intended default for most players. Enemies move at normal speed, difficulties scale naturally across 55 waves, and you start with $400. New enemy types are introduced progressively so you have time to adapt your strategy. Special abilities unlock mid-game at the same waves as always. This mode rewards solid turret positioning and good upgrade decisions without punishing small mistakes as harshly as higher difficulties.
Singularity is the advanced challenge mode. Enemies are faster and smarter from wave 1, HP values are significantly higher, and the wave count extends to 75. You start with only $300 gold, forcing harder trade-offs early. There are no bonus gold rewards between waves in Singularity — every dollar must come from kills. Only experienced players who have mastered turret synergies, ability timing, and soldier deployment should attempt this mode.
Autonomous Freeplay is the endless survival mode and the heart of the competitive experience. Maximum difficulty applies from round 1 — enemies are at full strength with no ramp-up. Waves never stop and enemies grow progressively stronger with each round. You start with $400. There is no win condition; the goal is to survive as many rounds as possible. Every completed game submits a score to the global leaderboard, ranked by highest round reached. This is the mode that puts you on the map.
Cover all path segments early. A single gap in your turret coverage is all an enemy needs to slip through unharmed. Prioritise getting at least one turret on every straight section of the path before upgrading existing ones.
Mix turret types. Single-type defences have hard counters. Armoured enemies shrug off basic turrets, stealth bots ignore everything unless revealed, and fast zigzaggers dodge slow projectiles. A mix of EMP, Laser, Rocket, and Basic turrets covers most scenarios.
Use EMP Turrets centrally. EMP Turrets stun a radius of enemies around them and are immune to Grok jamming. Placing one in the middle of your line means it never goes offline when Grok waves arrive.
Save Firewall for packed waves. The Firewall ability slows all enemies passing through it by 65%. It is most valuable in dense waves where multiple enemies are stacked — triggering it too early on a sparse wave wastes the cooldown.
Beacon before Virus Bomb. Activate Beacon (double fire rate) first, then immediately trigger Virus Bomb. You will fire more shots during the Bomb's slow-motion effect, dramatically increasing your total damage output.
Upgrade path choke points. Turrets placed at bends in the path cover more ground time. Upgrade these to tier 3 before placing more tier-1 turrets elsewhere — a tier-3 Rocket at a corner is worth three tier-1s on a straight.
Use soldiers for priority kills. Soldiers deployed on the road can chase and kill specific high-priority enemies that have passed your turret line. A Commander with aura upgrades boosts nearby turret fire rate significantly.
Yes, Humans VS AI.IO is completely free to play in your browser at humansvsai.io. No download or account required.
No download is required. Humans VS AI.IO runs entirely in your web browser. Just visit humansvsai.io and start playing instantly.
The game features ChatGPT, Claude, Gemini, Grok, Mistral, DeepSeek, Perplexity, Copilot and Meta AI as robot enemies, each with unique abilities inspired by their real-world counterparts.
Counter Claude with Rocket Turrets, which deal area-of-effect damage that suppresses the healing aura. Focus fire on Claude as a priority target — killing it removes the heal buff from all nearby enemies.
Place a Radar Tower or EMP Turret — both fully reveal stealth bots within their detection range, allowing your turrets to deal full damage instead of the 50% penalty applied to hidden enemies.
Each turret excels in different situations. The Tesla Turret is devastating against groups, the Sniper deals the highest single-target damage, and EMP is essential for controlling shielded or fast enemies. A mix of types is always more effective than specialising in one.
An endless survival mode at maximum difficulty from round 1. Enemies never stop coming and grow stronger each round. Every game submits a score to the global leaderboard ranked by highest round survived.
After an Autonomous Freeplay game, your round count is saved to the leaderboard. You can enter a name or skip to use a random one. Scores are ranked by highest round, visible on the main menu and updated in real time.
The game is designed for desktop browsers and works best with a mouse. It is playable on large tablets but is not optimised for small touchscreens.
Humans VS AI.IO was created by Lewis Coffey, an indie developer, using Phaser 3 and TypeScript. The game is hosted at humansvsai.io.
Free to play. No download. No account. Jump straight in.
▶ Play for Free at humansvsai.ioAlso read: How I Built a Tower Defence Game Where You Fight ChatGPT and Claude