Humble Bundle has 23-Item Earth Defense Force United! Game Bundle (PC Digital Download) on sale for $18.

Available Tiers:

• Tier 1 $1
  • Earth Defense Force 4.1 The Shadow of New Despair
• Tier 2 $5
  • Includes Tier 1
  • Earth Defense Force 4.1 Wingdiver The Shooter
• Tier 3 $12
  • Includes Tier 1 & 2
  • Earth Defense Force Iron Rain
  • Mission Pack 1 & 2: Time of the mutants, Extreme Battle DLC
  • Ifrit DLC
  • Blood Storm DLC
  • Gleipnir DLC
  • Spark Lancer DLC
  • BM03 Vegalta Gold DLC
  • Gigantus Tank, Bullet Girls Marking & EDF IFPS Markings DLC
  • Natsuiro HS Markings DLC
  • Reflectron Laser DLC
  • Sting Shot DLC
  • Volatile Napalm DLC
  • Pure Decoy Launcher Pack 5 A/B DLC
  • Depth Crawler Gold Coat DLC
  • Gigantus DCC Zero Marking DLC
  • Gigantus DCC Gogo Marking DLC
• Tier 4 $18
  • Includes Tiers 1, 2, & 3
  • Earth Defense Force 5
  • Earth Defense Force World Brothers

About this Bundle:

• Give your trigger finger a workout with this bundle of fast, frantic shooters, including a host of titles in the fan-favorite Earth Defense Force series! In Earth Defense Force 5, you'll team up in groups of up to 4 players to help fend off mind-boggling huge hordes of alien invaders in some of the most over-the-top action the series has ever seen. You'll also get a voxelized take on the series with Earth Defense Force: World Brothers, the action-packed spinoff Earth Defense Force: Iron Rain, the much-beloved Earth Defense Force 4.1—including all its DLC!—plus much more. Pay what you want for all this jam-packed bundle and help support the charity Oceana with your purchase.