Defend Earth from a demon invasion in this idle tower defense game. Make strategic choices to strengthen the planet with permanent upgrades, unlock new abilities, and recruit researchers. Leave it idle to grow even more powerful.
Reviews of Earth Defense are mostly negative: the game is rated 4.5/5 from 16 App Store ratings. What users like most: fun and addictive gameplay, cute characters and graphics. Top complaints: frequent game crashes, unresponsive tutorial. Summarized from real user reviews.
76
November 8, 2026
Bug fix
$2.99
Chapter 6 Clear Reward
Get 300 Diamonds
9 issues
Game crashes around chapter 11, wave 100-110
Game freezes at chapter 11, wave 103
5 requests
Cloud save functionality
Fix tutorial bugs
Earth Defense: Idle Simulator is an incremental tower defense game where players defend Earth from a demon invasion. The game focuses on making strategic choices to strengthen the planet through permanent upgrades and unlocking new abilities.
Key features include straightforward and engaging tower defense gameplay, unlocking new Earth abilities with gathered resources, collecting Skill Cards for rapid changes, recruiting researchers to study diverse abilities, and an idle progression system that makes the Earth stronger over time.
The game is free to download and play, but it includes in-app purchases and advertisements. This allows players to enhance their experience or progress faster through optional transactions.
The main goal is to defend Earth from a demon invasion and make it the strongest planet possible. Players achieve this by strategically upgrading Earth's defenses, abilities, and research capabilities.
While the description highlights an 'idle' progression system, it doesn't explicitly state offline play capabilities. Typically, idle games require an internet connection to track progress and potentially for ad delivery or in-app purchases.
