Invasion!

A mod for SE4 by Combat Wombat.

Features:

Cross-racial techs
New ship sizes, all leading up to the massive 5 megaton World Ship
Ship research split up into three types and featuring over 60 unique hulls
New 'Advanced' versions of ship hulls, improved over the standard hulls
Unique movement system, leading to medium tech ships being the fastest
Uses Neo-Standard shipsets, including some Neo-Standard+ ships with compatible shipsets
New events, such as Beer Festival, and When Pigs Fly
Completely unique base called an Oupost, and the massive 17 megaton World Base
Balanced space monsters, playable by human players instead of AI
Monsters feature an "evolutionary research path", getting new technology in steps
Monsters must attack fast to survive, loses out on tech advantage eventually
Pirate races, not able to make colonies but have acess to special pirate technology
New choices in race creation, such as new happiness types
Point defense less effective at lower levels, thus making fighters and missiles more effective
Unique Chemical Lasers, only able to fire once per combat but doing massive damage
Other new and unique weapons like the Quantum Warp Missile, and more advanced racial tech weapons
Leaky armor and shields, including Structural Supports making your ships hulls survive most punishment
Uses Image Mod and Sound Mod for more variety than stock
Compatible with the newest version of FQM Deluxe 2.10