Comparison

Underdark vs NOSLOW

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

NOSLOW

Features
Read full description

You never slow down. You only steer. NOSLOW is a one-touch arcade game with a twist: your ball is perfectly elastic. It never loses speed - and every orb you collect makes you PERMANENTLY faster. Your success is your difficulty. The better you play, the harder it gets. HOW IT WORKS - Hold anywhere: time slows to a crawl - Drag to aim, release to fly - same speed, new direction - Steering costs FAZ energy. Orbs refill it. Run dry and you're a passenger. BURN OR CLIMB - THE CHOICE THAT MAKES THE GAME - Hold longer and a ring fills around your ball. Let go once it's full and you erupt: a burst of speed, and for a second and a half every mine on the field is prey. - Hunting isn't free. It costs TIER HEAT - the same pool that carries you up the ladder. Never your speed. Your ball never slows. - So every flare is a real decision. Clear the field, or stay cold and climb higher? The best scores belong to players who barely needed to hunt. RISK IS THE ONLY WAY UP - Chain orbs without touching walls to build your combo - Graze mines by a hair for bonus points - cowards score less - Each heat tier multiplies your score: CYAN, VIOLET, MAGENTA, EMBER... and the legendary WHITE-HOT at x2.5 - Push to the ceiling and OVERDRIVE begins - double score, and a world that closes in FIVE WAYS TO PLAY - ENDLESS: the pure run, all-time leaderboard - DAILY: one seed, everyone, best try counts - fresh every day with its own board - ARENAS: ORBIT bends the walls into a circle, WARP turns the edges into portals, TWIN splits the field in two. Each keeps its own leaderboard. - CHALLENGES: three always-on goals that carry across runs and raise your RANK - MISSIONS: in-run goals that adapt to how you actually play EARN, DON'T PAY - Ember is earned by playing - runs, missions, daily streaks, tier records - Spend it on cosmetics and arenas. Never on power. Never on score. - Prestige styles can't be bought at any price - only earned - Every leaderboard score was earned under the same rules MADE FOR "ONE MORE RUN" - Runs last 1-2 minutes. Deaths are always your fault. That's the point. - One hand, one touch, no tutorial you have to sit through - Game Center leaderboards for endless, daily and every arena One hand. One touch. No brakes. Can you go WHITE-HOT?

Screenshots

Underdark4 screens
NOSLOW4 screens

Verdict

The call

The clearest difference is iOS requirement: Underdark at 13.0 against NOSLOW's 15.1. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Underdark sells 34 one-off in-app purchases and NOSLOW sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Underdark ships an update every 4 days, NOSLOW every 2 days. The most recent releases landed on October 20, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 9 level
Underdark versus NOSLOW: the parameters behind the verdict, then further details
ParameterUnderdarkNOSLOW
PriceFreeFree
Rating4.8 (4.1K ratings) — better—
Positive reviews72.0% of reviews—
Number of ratings4.1K — better—
Update frequencyEvery 4 daysEvery 2 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size508 MB57 MB
Age rating4+4+
DeveloperSeungHo ChungOsman Kose

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

NOSLOW

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
2 purchases

NOSLOW

One-time2
  • 1,600 Ember$4.99
  • NOSLOW+$5.99

Questions

Is Underdark free?
Underdark is free to download, with in-app purchases available.
Is NOSLOW free?
NOSLOW is free to download, with in-app purchases available.
Do Underdark or NOSLOW have ads?
Both Underdark and NOSLOW show ads.
Which is updated more often, Underdark or NOSLOW?
Underdark ships an update every 4 days, and NOSLOW every 2 days. Most recently, Underdark was updated on October 20, 2026 and NOSLOW on October 9, 2026.

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