Comparison

Underdark vs Blob Attack

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Defend the Eternal Flame
  • One-handed gameplay
  • Customize defense strategy
  • Level up and choose buffs
  • Hero abilities and enhancements
  • Earn trophies
Features
Read full description

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!

About

Blob Attack

Features
Read full description

The world’s last hope is... you. Armed with just one tower and a trickle of energy, you’ll face off against a relentless blob invasion that’s eager to turn you into goo. Start with a tower that barely gets the job done, then scrape together enough energy to unlock some serious firepower as blobs keep coming, mutating, and asking you, "Is that all you got?" If you like your tower defense games with extra slime, evolving enemies, and high-stakes strategy, The Blob Attack is for you. Think you can outsmart a bunch of goopy blobs? Time to prove it!

Screenshots

Underdark4 screens
Blob Attack4 screens

Verdict

The call

The clearest difference is in-app purchases: Blob Attack at none against Underdark's 35. Underdark's advantage is update cadence (every 4 days vs every 2 months). On price, ads, device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Underdark sells 34 one-off in-app purchases. Blob Attack asks for nothing beyond the download.

UpkeepUpdate frequency

Underdark ships an update every 4 days, Blob Attack every 2 months. The most recent releases landed on September 26, 2026 and September 12, 2026 respectively.

Scorecard2 real differences · 8 level
Underdark versus Blob Attack: the parameters behind the verdict, then further details
ParameterUnderdarkBlob Attack
PriceFreeFree
Rating4.8 (4.1K ratings) — better—
Positive reviews72.0% of reviews—
Number of ratings4.1K — better—
Update frequencyEvery 4 days — betterEvery 2 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size490 MB109 MB
Age rating4+9+
DeveloperSeungHo ChungStanislav Buchkov

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

Blob Attack

Not enough reviews yet to summarise bugs or requests.

In-app purchases

34 purchases

Underdark

One-time34
  • Event Package 1$0.99
  • daily_package_01$0.99
  • season_growth_1$0.99
Show 31 more
  • 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
None

Blob Attack

No in-app purchases

Questions

Is Underdark free?
Underdark is free to download, with in-app purchases available.
Is Blob Attack free?
Blob Attack is free to download, with no in-app purchases.
Do Underdark or Blob Attack have ads?
Both Underdark and Blob Attack show ads.
Which is updated more often, Underdark or Blob Attack?
Underdark ships an update every 4 days, and Blob Attack every 2 months. Most recently, Underdark was updated on September 26, 2026 and Blob Attack on September 12, 2026.

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