Alien Attack vs KAII
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Alien Attack
Lead an alien entity in an idle survival game to conquer the planet by consuming humans and evolving your army. Face formidable bosses and complete quests in exhilarating arcade action.
- Eternal Evolution upgrades
- Exhilarating arcade gameplay
- Epic boss battles
- Progression and exploration
- Consume humans to grow army
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Do you like survival rpg adventure games or maybe role playing fun idle games? Introducing "Alien Attack: Idle Arcade Game," the ultimate invasion idle survival game that will immerse you in a thrilling world of conquest and evolution. Take command of an alien entity on a quest for supremacy, consuming idle humans to grow your army and assert dominance over the planet. But beware, formidable bosses stand in your path, challenging your strategic prowess and evolutionary adaptability. Key Features: · Eternal Evolution: Defeat idle humans to unlock evolutionary upgrades for your alien overlord. Enhance its capacity, attack speed, and catching radius to efficiently devour your foes and leave no survivors. · Exhilarating Arcade Gameplay: Immerse yourself in fast-paced, arcade-style action that keeps you engaged and entertained. Experience the adrenaline rush as you lead your alien army to victory against waves of human invaders. · Epic Boss Battles: Test your skills in thrilling encounters against powerful bosses. Adapt your strategies and evolve your alien to emerge victorious and claim your dominance. · Progression and Exploration: Complete quests, unlock new locations, and face untamed enemies as you progress through levels of increasing difficulty. Immerse yourself in stunning visuals and sound as you explore the expansive world of Alien Attack: Idle Arcade Game. Are you ready to embrace your inner alien and dominate the planet, or will you succumb to the relentless onslaught of humanity? Download "Alien Attack: Idle Arcade Game" now and prove your dominance in the face of the human threat! Prepare for an epic adventure unlike any other, where survival depends on your strategic cunning and evolutionary prowess. Privacy Policy: https://playgenes.com/docs/privacy_policy_en.html Terms of Service: https://playgenes.com/docs/terms_of_service_en.html
KAII
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【KAII-ROKU — You are the last Sealer】 The creatures that should have vanished are stirring once more. Yokai, cryptids (UMA), and the urban legends whispered in the dark— hunt down 150 mysterious beings and seal them with your own hands. ■ Timing-Based Sealing Battles Tap the instant the shrinking spirit circle closes in. Nail a PERFECT for 1.5x power. Easy to learn, tense to master. ■ Explore 5 Haunted Spots Shrine → School → Abandoned Village → Sea of Trees → Lake. The deeper you go, the more fearsome the creatures. New areas unlock as you progress. ■ Forge Talismans & Amulets Upgrade your attack "Fuda" talismans and defense "Omamori" amulets across 6 tiers. Collect spirit coins, grow stronger, and take on tougher yokai. ■ Complete the Codex Every sealed creature is recorded in your bestiary. Collect all 150 yokai, cryptids, and urban legends—check their rarity, stats, and category. ■ Perfect for players who love ・Yokai, cryptids, and Japanese folklore ・Collecting and completing bestiaries ・Quick one-handed games for short breaks ・Dark, atmospheric Japanese horror
Screenshots
Verdict
The clearest difference is in-app purchases: KAII at none against Alien Attack's 18. On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Alien Attack sells 16 one-off in-app purchases. KAII asks for nothing beyond the download.
Alien Attack ships an update every 3 months, KAII every 6 weeks. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.
| Parameter | Alien Attack | KAII |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (10 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 381 MB | 78 MB |
| Age rating | 12+ | 12+ |
| Developer | P.D. PLAYGENES INTERNATIONAL LIMITED | yota hojo |
In-app purchases
Alien Attack
- Ads Blocker$0.99
- Pearl keys$1.99
- One-time offer!2 variants$2.99
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- One-time offer!$3.99
- Pile of Gems$4.99
- One-time offer!$4.99
- One-time offer!$5.99
- One-time offer!$6.99
- Heap of Gems$9.99
- One-time offer!$9.99
- One-time offer!2 variants$11.99
- One-time offer!$12.99
- One-time offer!$14.99
- One-time offer!$19.99
- One-time offer!$29.99
- One-time offer!$69.99
KAII
No in-app purchases









