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Engineering Tower Defense

Build sentries for your defense! Sentry are invulnerable and the ammo is refillable after disambled, all class marine can assemble sentry instantly, but it will still take time for refilling and disamblying the sentry. Use flare to burn biomass. All marine are engineers and have the basic knowledge of hacking. Aliens have rare chance to drop a medkit (it's the only way you can heal your marine).

Tip:
Sentry can be built instantly use it for your advantage, advance slowly and steady, refilling the ammo (disambly) will take some time, it's better not to let the sentry run out the ammo. Sentry ammo will be replenished upon dissamble and reassemble.

Recommended Difficulty:
Normal, Hard

Note:
This is a challenge, to activate it please select from challenge menu

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为您的防御建立哨兵！ 哨兵无懈可击，经过解说后可以重新装填弹药，所有级别的海军陆战队士兵都可以立即组装哨兵，但仍然需要一些时间来补充和拆除哨兵。 使用火炬燃烧生物质。 所有的海军陆战队员都是工程师，并且具有黑客的基本知识。 外星人难得有机会丢下医疗包（这是治愈海军陆战队的唯一方法）。

小费：
可以立即建立哨兵以利用您的优势，缓慢而稳定地前进，给弹药加注（散弹）需要一些时间，最好不要让哨兵用完弹药。 哨兵弹药将在进行解释和重组后得到补充。

推荐难度：
正常，困难

注意：
这是一个挑战，要激活它，请从挑战菜单中选择