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Alien Shooter TD
Innovative Tower Defense inspired by legendary Alien Shooter series! The game was created in keeping with the best traditions of Sigma`s games, no concessions of any kind - everything is just like in real life!
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via SteamSpy as of 2026-05-13.
“It's a fun TD game, and as much as I love the genre, I have to admit I absolutely do not like about 95% of the TD games I've played over the last 15 years or so. So if I like a TD game, it's a rare treat. This game is simple, you use soldiers instead of towers, but functionally…”
— a player, Steam review · 21 hrs played“Super fun and addictive TD with a great atmosphere and loads of cool upgrades”
— a player, Steam review · 29 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-08-02 18:47 UTC · history via SteamCharts.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Version 1.3.0 available!
Shadows support added. Two times less monster kills required for the Annihilator achievement. Minor upgrades and bugfixes.
Version 1.2.8 available!
What`s new: - Korean localization added. Special thanks to: dollppin AirQuick ThurSday 픗힝 vitamin RANEYO chanro89 - "Blood" option added to the settings menu. We thank all the players helping us to im
Version 1.2.8 available!
What`s new: - Korean localization added. Special thanks to: dollppin AirQuick ThurSday 픗힝 vitamin RANEYO chanro89 - "Blood" option added to the settings menu. We thank all the players helping us to im
Version 1.2.4 available!
More and more players complete the Alien Shooter TD story line and ask us to diversify the process of replaying missions at higher difficulty. We're happy to announce that now killing the final not on
Version 1.2.4 available!
More and more players complete the Alien Shooter TD story line and ask us to diversify the process of replaying missions at higher difficulty. We're happy to announce that now killing the final not on
Games like Alien Shooter TD
From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.
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84.1% · 772 reviews
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Aliens: Dark Descent
87.8% · 10,888 reviews
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Alien Shooter 2: Reloaded
90.1% · 868 reviews
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-13.
| Genres | Action, Indie, Strategy |
| Player tags | Tower Defense · Gore · Strategy · Action · Blood · Shooter · Sci-fi · Survival · Real Time Tactics · Violent · Aliens · Indie (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Trading Cards · Steam Cloud · Stats · Steam Leaderboards · Family Sharing |
| Languages | English, Russian, Korean |
| Achievements | 21 |
| Estimated owners | 100,000 – 200,000 (SteamSpy) |
| Official site | http://www.sigma-team.net |
Minimum system requirements (PC)
Minimum: OS *: Windows 7 (service pack 1), 8, 10 Processor: Intel Core 2 Duo T5200 @1.6GHz / AMD Athlon 64 X2 3600+ @2000MHz or better Memory: 2 GB RAM Graphics: 512 MB video card Storage: 500 MB available space