About CatWars.io

Survive solo, push Hardcore for bigger rewards, or fight beside AI cats in Cats vs Dogs. No install, no pay‑to‑win — just jump in and become the strongest cat.

CatWars.io is a free browser-based 2D top-down survival action game. You play a brave little cat fighting endless waves of dogs across an open map. Hunt food to gain experience, evolve through 50 distinct levels (from a tiny Kitten all the way up to a mythical God Cat), unlock weapons and helmets in the Codex, and survive as long as you can.

The game runs entirely in your browser — there is nothing to install. You can play instantly as a guest, or sign in with an account (e‑mail or Google) to save your progress to the cloud and appear on the public leaderboards.

Game modes

• Solo Survival — the classic mode. Survive against waves of dogs, evolve your cat and beat the Omega Boss.
• Hardcore — stack difficulty modifiers (double damage, fast dogs, no healing, double bosses, no dash) for a much higher gem multiplier and a special Competitive Hardcore leaderboard.
• Cats vs Dogs — fight alongside eight AI‑controlled cat allies that level up, steal food and battle the hordes with you.
• Deathmatch — a free‑for‑all cats vs cats battle. Fight against AI cat opponents in a PvP arena while the dog horde keeps the pressure on.

Meta‑progression

Gems are CatWars' permanent currency. You spend them in the Codex (Encyclopedia) on permanent weapon upgrades, helmet bonuses, daily quests and active boosts. Boosts can be equipped before a run for in‑match bonuses such as extra damage, faster pickup, more gems or a shield.

The Daily Spin gives you a free reward every 24 hours, and chests scattered across the map drop additional gems and food. There is no pay‑to‑win — all progression is earned through play.

How to Play

Controls

• Move — your cat follows the mouse cursor.
• Attack — Left Click swings your weapon in front of you.
• Dash — Space or Right Click performs a short dash with brief invulnerability. Dash has a cooldown shown at the bottom of the screen.
• Pause — Esc or the pause button in the corner.

Basic loop

1. Hunt food (fish, mice, etc.) — each pickup gives XP and small healing.
2. Level up to choose a perk (more damage, projectiles, life‑steal …).
3. Fight increasingly tougher dogs and minibosses to earn gems.
4. Defeat the Omega Boss to win the run — or push for a high score.

Tips for new players

• Always pick up food before chasing kills — XP is the main driver of your power.
• Use dash through dog groups, not away from them — the invuln frames are short.
• In Hardcore, stack modifiers gradually. The gem multiplier scales, but a bad combination (e.g. No Dash + Fast Dogs) is brutal at low level.
• In Cats vs Dogs, allied cats steal kills and food. Stay on the edge of the pack and use them to soak boss aggro.
• Spend gems on permanent weapon upgrades first — they compound across every run.

Privacy Policy

This policy explains what CatWars.io collects, why, and what your rights are under the EU General Data Protection Regulation (GDPR) and the UK GDPR. CatWars.io is operated as a hobby project; the data controller is the operator listed in the Contact tab.

1. What we collect

• Account data (only if you register or sign in with Google): a nickname and an authentication identifier provided by Firebase Authentication. Passwords are never stored by us in plain text — Firebase handles them.
• Game progress: level, kills, gems, equipped boosts, daily quest progress and best times. Saved to Firebase Firestore so you can play across devices. Guests are stored only in your browser's localStorage.
• Leaderboard entries: your chosen nickname, level and score are visible to other players on the public leaderboard.
• Technical & analytics data: pages viewed, approximate region, device type, browser and basic event data (e.g. game start / game end) via Google Analytics 4. No raw IP is stored by us.
• Advertising data: handled by Google AdSense to show ads — see the Cookies & Ads tab.

2. Why we use it (legal basis)

• Contract / service — to give you the game, save progress and run the leaderboard (Art. 6(1)(b) GDPR).
• Legitimate interest — basic security, anti‑cheat and aggregated analytics (Art. 6(1)(f) GDPR).
• Consent — personalised advertising and non‑essential cookies in the EEA / UK (Art. 6(1)(a) GDPR). Consent is collected through Google's Consent Management Platform.

3. Who we share with

We use the following processors / third parties:

• Google Firebase (Authentication, Firestore) — account and progress.
• Google Analytics 4 — usage statistics.
• Google AdSense — advertising.

These services may transfer data outside the EEA under Google's Standard Contractual Clauses. We do not sell personal data to anyone.

4. How long we keep it

Account data and progress are kept while your account exists. You can delete your account at any time (see Contact). Anonymous / guest data lives only in your browser and is removed when you clear it.

5. Your rights

You have the right to access, correct, delete, port and object to the processing of your data, and to withdraw consent at any time. You can also lodge a complaint with your national data protection authority.

6. Children

CatWars.io is suitable for general audiences but is not directed at children under 13 (or under 16 where required by local law). If you believe a child has provided personal data, contact us and we will delete it.

Cookies & Ads

CatWars.io is free to play and is funded by advertising. To keep the game running we use a small number of cookies and similar technologies.

Essential

• Firebase Authentication — keeps you signed in.
• localStorage — stores your offline / guest progress and audio settings on your own device.

Analytics

• Google Analytics 4 (_ga, _ga_*) — measures usage so we can balance the game.

Advertising

• Google AdSense — shows ads on the menu and in‑game screens. For visitors from the EEA, the UK and Switzerland, Google's Consent Management Platform (CMP) asks for your consent before any personalised advertising or measurement cookies are set. You can choose Consent or Manage options to reject personalisation, in which case only non‑personalised ads are shown.

You can withdraw or change your consent at any time by clearing site data in your browser, or via Google's Ads Settings. More info: Google's advertising policy and privacy policy.

Contact

Questions, takedown requests, account deletion requests, or just feedback? Reach out to the developer at:

📧 info.catwarsio@gmail.com

Please include the nickname you play under so we can locate your data.