Underdark vs Block Clash
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Underdark
Defend the Eternal Flame from relentless dark forces in this tactical tower defense game. Strategically place towers, choose buffs, and level up your heroes to forge an impenetrable defense. Enjoy one-handed gameplay for strategic fun anytime, anywhere.
- Defend the Eternal Flame
- One-handed gameplay
- Customize defense strategy
- Level up and choose buffs
- Hero abilities and enhancements
- Earn trophies
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Defend the Flame from the dark! Level up, strategically place towers, and choose buffs to grow stronger. Keep the light alive! Defend the Eternal Flame: Experience the thrill of defending the flame from hordes of dark forces that besiege it! Feel the exhilaration as you clear stages, with each victory more satisfying than the last. One-Handed Gameplay: Enjoy easy-to-master controls, designed for one-handed play. Perfect for strategic fun anytime, anywhere. Customize Your Defense Strategy: Select buffs and strategically place towers to forge your path of resistance. As you level up and choose your growth buffs, your defense becomes an impenetrable fortress. Heroic Stand: Choose your guardians to stand against the night. Each hero brings unique abilities to the battlefield. Earn trophies, level up, and enhance your heroes to ensure the flame flickers on through the darkest nights!
Block Clash
Engage in hyper-casual tower defense battles with random elements. Explore new events, unlock powerful skills like invincibility, and expand your gameplay with additional stages. Enjoy balance adjustments and a revamped profile screen.
- Hyper-casual random defense
- New event: Treasure Expedition
- Invincibility skill
- Expanded stages (Chapter 30)
- Revive invincibility buff
- Profile screen
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A new event "Treasure Expedition" has begun! The Invincibility skill has been added. The profile screen has been added. Stages have been expanded up to Chapter 30. An invincibility buff effect has been added whenever you revive. Balance adjustments have been made.
Screenshots
Verdict
Underdark and Block Clash both sit at 4.8 stars, but that hides the real split: 72% of Underdark's written reviews are positive against 34% of Block Clash's. Underdark also leads on update cadence (every 4 days vs every 11 days) and ratings volume (4.1K vs 1.1K). On price, rating, ads and in-app purchases 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. Underdark sells 34 one-off in-app purchases and Block Clash sells 20 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for Underdark against 4.7 for Block Clash. Both are backed by a comparable volume of ratings — 4.1K and 1.1K respectively. Written reviews are what separate them: 72% of Underdark's written reviews are positive against 34% of Block Clash's.
Underdark ships an update every 4 days, Block Clash every 11 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.
| Parameter | Underdark | Block Clash |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4.1K ratings) — better | 4.7 (1.1K ratings) |
| Positive reviews | 72.0% of reviews — better | 34.0% of reviews |
| Number of ratings | 4.1K — better | 1.1K |
| Update frequency | Every 4 days — better | Every 11 days |
| Ads | Yes | 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 | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 508 MB | 237 MB |
| Age rating | 4+ | 4+ |
| Developer | SeungHo Chung | Neptune Company |
Customer experience
Underdark
Block Clash
User reviews
Underdark
From 4.1K App Store ratingsWhat we love
- 🚀 Addictive gameplay
- 👍 Generous with rewards
- 🚀 Smooth performance
- 👍 No forced ads
- 👍 Unique tower defense mechanics
Room to improve
- 🐛 Multiplayer issues
- 🔋 Battery drain
- 🔒 Paywall for progression
- 🔒 Excessive microtransactions
- 🔒 Confusing UI with too many menus
Block Clash
From 1.1K App Store ratingsWhat we love
- 👍 Fun game
- 🕹️ Moderate strategy and play options
- 💰 Doesn't inundate with ads
Room to improve
- 🐛 Bugs and glitches (mobs cease to spawn, damage reduced, progress lost)
- 🔧 Needs more polish
Bugs and requests
Underdark
Reported bugs
3 issues- Goblin tower factory causing game slowdown
- Consecutive login rewards reset after updates
- Invisible towers in multiplayer
Requested features
5 requests- Ability to rotate towers
- Move towers after placement
- More enemy variety and animations
- Improved co-op mode
- Simplified progression system
Block Clash
Reported bugs
4 issues- Mobs cease to spawn in certain levels
- Damage reduced after update
- Progress lost after update
- Unable to proceed to next level after beating a stage
Requested features
2 requests- More levels and content
- Improved stability and bug fixes
In-app purchases
Underdark
- Event Package 1$0.99
- daily_package_01$0.99
- season_growth_1$0.99
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- dailyshop_1$1.99
- blade_pakcage$2.99
- daily_package_02$2.99
- exp_2x$3.49
- skin_30501$3.49
- Event Package 2$3.99
- pet_package$4.99
- weekly_package_01$6.99
- add_speed$7.49
- pass_hero_115$7.49
- pass_hero_102$7.49
- pass_hero_110$7.49
- season_superpass_1$7.99
- pack_remove_ads$7.99
- daily_package_03$7.99
- hero_legend_santa$8.99
- hero_legend_tower$8.99
- hero_legend_armor$8.99
- Event Package 3$8.99
- hero_legend_joker$8.99
- hero_legend_necromancer$8.99
- hero_legend_chicken$8.99
- tower_legend_614$8.99
- ud_pack_20106$8.99
- tower_legend_628$8.99
- pack_remove_ads2$10.99
- Event Package 4$12.99
- season_level_1$16.99
- season_stage_1$16.99
- Event Package 5$17.99
- season_hyperpass_1$18.99
Block Clash
- small_noads_ticket$0.99
- starter_package$0.99
- insufficient_energy_package$0.99
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- small_silvercoin_currency$0.99
- medium_noads_ticket$1.99
- small_ticket_package$1.99
- Booster Package$2.99
- large_noads_ticket$3.99
- base_no_Ads_package$3.99
- medium_ticket_package$4.99
- medium_coin_currency$4.99
- reward_multi_package$6.99
- jumbo_no_Ads_package$6.99
- pass_key_premium$7.99
- large_coin_currency$9.99
- Extra_noads_ticket$11.99
- big_ticket_package$12.99
- Extra_coin_currency$19.99
- Huge_noads_ticket$24.99
- Huge_coin_currency$49.99
