Bio Crisis vs Overdrive II
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Bio Crisis
Experience an exciting, cover-based shooter with a futuristic storyline. This polished pixel shooter offers challenging gameplay, a medal system, and numerous weapons and upgrades. It's a fresh take on old-school gaming with 36 missions to conquer.
- Cover-based shooting mechanics
- Futuristic storyline
- 36 total missions
- Medal system
- Tons of weapons and gears
- Upgradeable weapons
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Bio Crisis, what can I say, one hell of a cover based shooter that excites and challenges all players -Touch Arcade Bio Crisis is highly recommended for fans of the genre, especially if you’re sick of the mindless shooters found throughout the AppStore. -Theappshack Fans of old school games will absolutely love it. -Touchgen A game that gives a sense of nostalgia while also feeling fresh. -appolicious Bio Crisis is a highly polished pixel shooter, worthy of your device, it’s tough going but extremely fun -Appzilla There is no school like the old school! And Bio Crisis is old school at its finest. The game which had won multi Indie Game Design Awards now is refined, polished, upgraded and bringing more fire power than its original version to the Appstore! Game is well build even for today’s mobile standard, dodging bullets, hide behind an object, stealth knife kill in close combat, roll through the bullet rains unharmed are just a few of what this game can bring to the table. With a storyline set in the future, it will sure keep the players feel like being a part in this exciting action packed adventure. With loads of different weapons, upgrades and powerup items to choose, ammunition is one thing that’s not short of in this game. 36 Total Missions Medal System Supports both iPhone, iPod Touch and iPad 3 More Challenging Stages Tons of Weapons and Gears Upgradeable Weapons ★★★★★ email: info[at]sphinxjoy[dot]com ★★★★★ ▶ Visit us: http://www.sphinxjoy.com ▶ Like us: http://facebook.com/sphinxgames ▶ Follow us: http://twitter.com/sphinxgames ▶ Watch us: http://youtube.com/sphinxgames
Overdrive II
Engage in a sci-fi hack and slash adventure set in a post-apocalyptic world. Battle a rogue AI's robot army with your ninja warrior skills. Upgrade your character, collect gear, and influence the story in this offline action RPG.
- Hack and slash platformer gameplay
- Sci-fi theme and futuristic story
- Character upgrades and customization
- Offline playability
- Modern 3D graphics and realistic physics
- Story mode with intriguing narrative
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Are you ready for the sequel to Overdrive – Ninja Shadow Revenge? Overdrive II is a hack and slash platformer shadow fighting game with a sci-fi theme and a futuristic story-line. Overdrive II tells a story of the world 100 years after the Apocalypse. The Fall does not put an end to humankind, but make them stronger than ever. Robots and cyborgs are in support of humans until the rise of a dark corrupted AI, which builds its own army of robots to take over the whole world from mankind. There goes the endless shadow battle between the robotic army and a shadow legion of human ninja warriors who swear to defense their people and this world. The world stands on the edge of an epic war. The mighty force that the Gates of Shadows released many years ago is now an ordinary power source. This shadow energy is both a tool and a weapon, but not everyone wants to keep it this way. Let’s explore the sci-fi design of Overdrive II and enjoy RPG experience! This shadow revenge game offers you an opportunity to equip your character(s) with Overdrive gears and upgrade them to have special ninja ultimate skills. Be a part of the justice legion and fight your way to victory. Make every slash of your sword counts! Choose your looks and a fighting weapon before you decide the fate of this world. Collect tons of different weapons and armor on your journey. Unlock special abilities by collecting unique sets. Influence the storyline by choosing your faction. AMAZING FEATURES of the game: - Enjoy modern 3D-graphics, realistic physics and animation. - Playable OFFLINE, so no more worries of no Internet when playing this shadow game. - Smooth and intuitive warrior fighting game control experience to crush enemies and slay bosses. - Characters to be upgraded, customised & equipped with special Overdrive gears and more! - Ultra-stunning sci-fi graphic & effects - Story mode with an intriguing storyline to understand the world within Overdrive II. Are you gonna be the warrior hero of a futuristic world? Deep dive into Overdrive II now! Have any question or feedback to make the game better? Please let us know. Contact us via email: overdrive@gemmob.com Or like our fanpage: https://www.facebook.com/mobilearcadegame/
Screenshots
Verdict
The clearest difference is rating: Bio Crisis at 4.6 against Overdrive II's 4.0. Bio Crisis also leads on ads (none vs shown) and review sentiment (90% vs 57%). Overdrive II's advantage is update cadence (every 6 days vs every 4 months). On price, in-app purchases, monetization model 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. Bio Crisis sells 8 one-off in-app purchases and Overdrive II sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Bio Crisis holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Bio Crisis has 1.2K ratings behind it against 48, so its average is the more settled of the two. Written reviews point the same way: 90% of Bio Crisis's written reviews are positive against 57% of Overdrive II's.
Bio Crisis ships an update every 4 months, Overdrive II every 6 days. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Bio Crisis | Overdrive II |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.2K ratings) — better | 4.0 (48 ratings) |
| Positive reviews | 89.9% of reviews — better | 56.8% of reviews |
| Number of ratings | 1.2K — better | 48 |
| Update frequency | Every 4 months | Every 6 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 4.3 — better | 15.0 |
| Further details — not scored | ||
| Size | 18 MB | 197 MB |
| Age rating | 9+ | 9+ |
| Developer | Dalian Sphinx Entertainment Co., Ltd. | GEM MOBILE SOFTWARE COMPANY |
Customer experience
Bio Crisis
Overdrive II
User reviews
Bio Crisis
From 1.2K App Store ratingsWhat we love
- 👍 Good gameplay
- 🚀 Addictive and fun
- 🎨 Retro/old-school style
- 💯 Great for killing time
- 🎮 Nostalgic feel
Room to improve
- 💰 In-app purchases for ammo/health
- 🔫 Ammo/health too limited
- 🕹️ Controls can be frustrating
- 🤖 Repetitive enemy types
- 📚 Underdeveloped story
Overdrive II
From 48 App Store ratingsWhat we love
- 👍 Fun and addictive gameplay
- ✨ Great skills and graphics
- ⚔️ Good hack and slash mechanics
- 🎮 Enjoyable for no Wi-Fi
- 🤩 Best game so far for some
Room to improve
- 💸 Overpriced in-app purchases
- 😩 Too many ads
- 🚫 Game feels abandoned
- 📉 Lack of updates
- 🔄 Repetitive gameplay
Bugs and requests
Bio Crisis
Reported bugs
4 issues- Occasional crashes
- Stuck movement/aiming issues
- Dialogue/text errors
- Inconsistent performance on older devices
Requested features
5 requests- Multiplayer co-op mode
- More weapon/character customization
- Increased ammo/health drops
- Longer levels/campaign
- Improved boss battles
Overdrive II
Reported bugs
12 issues- Account deleted without user action
- Game crashes or won't load
- Lost all progress after update
- Weekly missions not registering correctly
- Cannot enhance items
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- Cannot progress past certain zones/levels
- Ad mini-game crashes the game
- Game freezes on older devices
- Level cap bugs out game after level 100
- Starter pack glitched
- Mission reward pop-ups persist
- Ads not working
Requested features
7 requests- Replay lunar new year event
- Add more playable characters
- Allow control customization
- Implement cross-save functionality
- Explain how to get the fourth ability
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- Add more challenging sectors
- Remove level cap
In-app purchases
Bio Crisis
- 10,000 Coins$0.99
- Instant Revive$0.99
- 25000 Coins$1.99
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- 70000 Coins$4.99
- 150000 Coins$9.99
- 230000 Coins$14.99
- 500000 Coins$29.99
- 1200000 Coins$49.99
Overdrive II
- Gem pack 1$2.99
- Sheild Drone$2.99
- Gun Drone$2.99
Show 7 moreShow fewer
- Remove Ads$2.99
- Gem pack 2$4.99
- Gem pack 3$9.99
- Gem pack 4$19.99
- Dagger S Sword$19.99
- Jade General Sale 20%$39.99
- Amber Paladin$49.99
Questions
Is Bio Crisis free?
Is Overdrive II free?
Which has better reviews, Bio Crisis or Overdrive II?
Do Bio Crisis or Overdrive II have ads?
Which is updated more often, Bio Crisis or Overdrive II?
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