Illegal Alien Tower Defense: Repel the Third-Worlder Invasion

8/22/2026, 3:34:13 PM

Release date: 5/26/2026

Tags: #strategy #singleplayer #tower-defense #immersive-sim #3d #isometric #minimalist #stylized

User Reviews

Score: 100%4 user reviews
Review Count: 4 reviews
Fetched At: 8/22/2026, 3:34:13 PM

Reference prices

Japan

¥ 265 (JPY)

Steam JP

$1.99 (USD)

Steam Global

Live Store Snapshot

Body text may reflect the state at publication time. For the latest sale, price, and review changes, prioritize the live price panel, review panel, and the Steam store listing.

Japan Price: ¥ 265
Global Price: $1.99
Price in Your Region: ¥ 265Prices as Steam lists them per country. What you are actually charged depends on your Steam account settings.Regional prices checked: 30 Aug 2026
Sale Status: Regular pricing
Price Checked At: 8/26/2026, 9:27:30 PM

The price snapshot and review snapshot differ by about 102 hours. Because they are not always refreshed at the same time, confirm the latest Steam listing before making a purchase decision.

Key highlight

Defend Earth from the 'Third-Worlder' alien invasion using the salvaged Sentinel AI in this 3D isometric tower defense strategy game.

Who this is for

The fate of Earth rests in your hands! Dive into a unique world and strategic tower defense with *Illegal Alien Tower Defense*.

Details

Overview

Prepare for an unconventional defense in Illegal Alien Tower Defense, a strategy game developed and published by Forbidden Knowledge. Earth is under siege by the 'Third-Worlders,' an alien species from a nearby star system intent on transforming the planet into a desolate wasteland. Players step into the shoes of Johnny Righteous, a former Department of Defense programmer who must utilize the last remnants of a canceled top-secret AI, Sentinel, to fend off the extraterrestrial onslaught and preserve civilization.

Highlights

Experience a unique tower defense scenario where you defend Earth from an alien invasion.
Employ the power of Sentinel, a salvaged defensive AI, to combat the rampaging hordes.
Immerse yourself in a 3D isometric world with stylized visuals, focusing on strategic single-player gameplay.

Who It's For

This game is for players who enjoy strategic thinking and tower defense mechanics, particularly those who appreciate a unique premise and a stylized visual presentation. Fans of immersive sim elements and single-player experiences will find a compelling challenge here.

Game Info

Illegal Alien Tower Defense is a paid title released on May 26, 2026. It features single-player strategy gameplay with a strong focus on tower defense elements. The game utilizes a 3D isometric perspective and boasts a stylized visual design. Developed and published by Forbidden Knowledge, it is currently available in English.