I like science fiction. I like 4X games. Is the Explore & Expand bundle worth it?

$1 level

• Halcyon 6: Lightspeed Edition (Mac 32-bit, $15) - Halcyon 6 + DLC, storyline reminds me of Star Trek Trexels and some of the elements are a bit similar (e.g. you build up a space station, train crew, and man station systems).
• Rain of Reflections: Chapter 1, Set Free (Windows, $10) - Adventure game with turn-based tactical combat.
• Sins of the Solar Empire: Trinity (Windows, $20) - Real-time 4X game. Looks like got replaced by SotSE: Rebellion. Looks a bit too complicated.

$7 level

• Starpoint Gemini Warlords (Windows, $35) - 4X with ship combat and RPG elements.
• Galactic Civilizations III (Windows, $40) - A huge game with lots of expensive expansions. Actually the base game includes Crusade, Mega Events and Retribution so Humble Bundle is being a bit misleading.
• Galactic Civilizations III: Crusade Expansion Pack ($20)
• Galactic Civilizations III: Mega Events DLC ($4)
• Galactic Civilizations III: Retribution Expansion ($20)

$10 level

• Stellaris: Galaxy Edition ($50) - 4X game from Paradox Interactive and they're pretty good about keeping games updated, though there are a lot of paid expansions which is why Paradox can continue supporting the base game. Galaxy upgrade is $10 and is basically non-game content: soundtrack, collector's book, novel.

So the bundle reduces to the one game I can play on my Mac, Stellaris base game ($40) at 75% off. Does not seem worth it.