Round Defense vs CrystalReactor
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Round Defense
Engage in a vibrant 2D tower defense game where you strategically place and upgrade defenses to stop waves of enemies. Each round presents new challenges, encouraging smarter choices and longer survival. Designed for quick, fun play sessions, it's easy to learn but offers deep replayability.
- 2D tower defense gameplay
- Colorful cartoon-style visuals
- Increasingly challenging enemy waves
- Strategic tower placement
- Upgrade-based progression
- Simple controls and clean UI
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Get ready for a fast, colorful, and strategic tower defense experience. Build your defense, place towers along the path, and stop waves of enemies before they reach the end. Each round challenges you to make smarter choices, improve your strategy, and survive longer. This game is designed to be simple to start, but fun to replay. Watch enemies move through the path, upgrade your defenses, and test how far your strategy can take you. Features: • 2D tower defense gameplay • Colorful cartoon-style visuals • Enemy waves with increasing challenge • Strategic tower placement • Upgrade-based progression • Simple controls and clean UI • Designed for quick and fun play sessions Whether you are new to tower defense games or already enjoy strategy games, this game gives you an easy way to jump in, defend your path, and improve your tactics with every attempt. More levels, enemies, upgrades, and gameplay improvements may be added over time based on player feedback.
CrystalReactor
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Crystal Reactor is a neon sci-fi arena defense game where you protect a living crystal core at the center of the battlefield. Waves of machines rush in from every side while your reactor fights automatically — you focus on strategy, upgrades, and survival. After each wave, choose one of three technologies to strengthen your build. Stack lasers, chain lightning, plasma, freeze effects, shields, and orbital drones. Combine compatible powers to unlock fusion upgrades like Cryolaser, Ion Storm, and Thermonuclear Charge for devastating new attack patterns. Pick from five reactor cores, each with its own technology tree and playstyle. Laser favors precise beams, Electric chains lightning across crowds, Plasma delivers heavy explosions, Gravity pulls enemies inward, and Cryo slows the arena under your control. Fight across six unique zones with their own rules. Slippery ice speeds up attackers, low gravity on the space station extends your range, biolab swarms regenerate, desert heat weakens shields, underground corridors bring denser spawns, and volcanic vents damage everyone on the field. Between runs, spend crystals and technology cores in the Meta Lab. Unlock new reactors, open additional zones, expand your technology slots, and buy starting bonuses. Every run teaches you a new build — every victory pushes your core further. Features: • Automatic arena combat with wave-based enemy assaults • Roguelike technology drafts and fusion combinations • Five reactor types with distinct upgrade paths • Six arenas with unique hazards and enemy behavior • Boss fights including Titan, Carrier, Omega Core, and Void Crystal • Permanent meta progression between runs • Neon sci-fi visuals optimized for iPhone and iPad Defend the core. Forge the perfect reactor. Survive the next wave.
Screenshots
Verdict
The clearest difference is in-app purchases: CrystalReactor at none against Round Defense's 1. CrystalReactor also leads on device support. On price and iOS requirement 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. Round Defense sells 1 one-off in-app purchase. CrystalReactor asks for nothing beyond the download.
| Parameter | Round Defense | CrystalReactor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Ads | — | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | — | iPhone, iPad — better |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 34 MB | 16 MB |
| Age rating | 12+ | 4+ |
| Developer | OMER FARUK SEN | Bohdan Kalinichenko |
In-app purchases
Round Defense
- Remove Ads$2.99
CrystalReactor
No in-app purchases
Questions
Is Round Defense free?
Is CrystalReactor free?
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