Underdark vs Long/Short Duel
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 powerful buffs, and level up unique 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 heroes
- Strategic tower placement
- Choose buffs
Read full descriptionHide 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!
Long/Short Duel
Read full descriptionHide full description
The chart is the battlefield. Long/Short Duel is a card battle on a fictional coin chart. Take a long or short position, then play cards to push the price up or drag it down. Drive the price through your rival's liquidation line and you win. Let it reach yours first and you are out. Short matches, sharp calls - Every candle that closes changes the board. Read the card your rival is lining up, then block it or hit back. - Every card has a chart shape it loves. When a closing candle matches it, the card turns gold, and that is the moment to throw it. Timing is the skill. Collect and level up - Thirty-plus cards, each with a job. Build your own eight-card deck or start with auto-build. - Win supply crates, collect copies and level your cards. Every crate shows its odds. Nine coins, nine hosts - Start on a steady major coin, climb through the altcoins, and end in the frantic meme-coin alley. - Every coin has its own host, with its own way of shaking the price. Friends and strangers - Quick duels and friend invites through Game Center, on the same chart. Nothing is on the line; it is skill only. - Practise against the AI any time. Built for feel - Haptics on every card, struck-metal coins, rank badges and looks, music that tightens toward the bell. Fair by design - No paid random items. - Ads are rewarded ads you choose to watch, plus one short ad between matches every few games. Never during a match or in duels. A fictional market. Nothing here involves real coins, real exchanges or real money, and nothing in the game is investment advice.
Screenshots
Verdict
The clearest difference is in-app purchases: Long/Short Duel at none against Underdark's 10. Long/Short Duel also leads on update cadence (every 2 days vs every 4 days). Underdark's advantage is iOS requirement (13.0 vs 17.0). On price, ads 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. Underdark sells 10 one-off in-app purchases. Long/Short Duel asks for nothing beyond the download.
Underdark ships an update every 4 days, Long/Short Duel every 2 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | Underdark | Long/Short Duel |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4.1K ratings) — better | — |
| Positive reviews | 72.0% of reviews | — |
| Number of ratings | 4.1K — better | — |
| Update frequency | Every 4 days | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 520 MB | 89 MB |
| Age rating | 4+ | 12+ |
| Developer | SeungHo Chung | Jehyung Lee |
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
Long/Short Duel
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Underdark
- daily_package_01$0.99
- blade_pakcage$2.99
- daily_package_02$2.99
Show 7 moreShow fewer
- exp_2x$3.49
- Event Package 2$3.99
- add_speed$7.49
- season_superpass_1$7.99
- pack_remove_ads$7.99
- pack_remove_ads2$10.99
- season_hyperpass_1$18.99
Long/Short Duel
No in-app purchases









