Underdark vs 啟TD
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!
啟TD
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《啟TD》是一款直向魔法塔防遊戲。你將配置不同能力的防禦塔,在怪潮與 BOSS 的壓迫下強化城門、調整陣形,守住啟之戰場的最後防線。 【六房塔防戰場】 在多個房間中選擇防守位置,依照敵人路線配置火力、控制與支援塔。每一場戰鬥都需要重新判斷資源與升級順序。 【多樣防禦塔】 從晶弩、裂甲、霜印、爆符等基礎塔開始,逐步解鎖元素、支援與特殊塔。不同塔能造成緩速、破甲、範圍傷害、增益與城門防護效果。 【持續養成】 使用戰鬥獎勵強化防禦塔與技能,收集特殊塔碎片,建立自己的防守流派。 【怪潮與 BOSS 挑戰】 面對不斷增強的敵人與大型 BOSS,觀察戰況、集中破甲與爆發火力,挑戰更高關卡紀錄。 【排行榜與雲端進度】 登入遊戲後可保存進度並提交最高闖關紀錄。正式版本將持續調整平衡與改善操作體驗。 本遊戲含可選擇購買的消耗型虛擬貨幣。虛擬貨幣可用於隨機召喚;每種獎勵的取得機率會在召喚前於遊戲內揭露。遊戲不含現金賭博,虛擬物品不可兌換現金。
Screenshots
Verdict
The clearest difference is device support: Underdark at 3 against 啟TD's 1. Underdark also leads on iOS requirement (13.0 vs 16.0). 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
Both are free to download. Underdark sells 34 one-off in-app purchases and 啟TD sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Underdark ships an update every 4 days, 啟TD every 6 days. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.
| Parameter | Underdark | 啟TD |
|---|---|---|
| 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 — better | Every 6 days |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 508 MB | 1.1 GB |
| Age rating | 4+ | 12+ |
| Developer | SeungHo Chung | Chin-Hsuan Chang |
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
啟TD
Not enough reviews yet to summarise bugs or requests.
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
啟TD
- 300 鑽石$0.99
- 800 鑽石$1.99
- 2,000 鑽石$3.99
Show 2 moreShow fewer
- 5,000 鑽石$9.99
- 60,000 鑽石$99.99









