
Alien Swarm: Reactive Drop is a free, open-source cooperative top-down shooter where players team up with other marines to battle waves of aliens and accomplish various mission goals. The game features four distinct classes, each with two unique characters that have varying stats and access to class-specific weapons. As you play, you'll gain experience points that can be used to unlock new weapons and gear for combat. The gameplay blends elements from survival shooters such as Shadowgrounds and Left 4 Dead.

| Audio | Subtitles | Interface | |
|---|---|---|---|
| 简体中文 | ✓ | ✓ | |
| 繁體中文 | ✓ | ✓ | |
| Dansk | ✓ | ||
| English (US) | ✓ | ✓ | ✓ |
| Français | ✓ | ✓ | |
| Deutsch | ✓ | ✓ | |
| Magyar | ✓ | ||
| Italiano | ✓ | ✓ | |
| 日本語 | ✓ | ✓ | |
| 한국어 | ✓ | ✓ | |
| Português (Brasil) | ✓ | ✓ | |
| Português (Portugal) | ✓ | ✓ | |
| Русский | ✓ | ✓ | |
| Español (España) | ✓ | ||
| Türkçe | ✓ | ||
| українська | ✓ | ✓ | |
| Tiếng Việt | ✓ | ✓ |