- New units: Gillman Hero, Skeleton, Lich, Wizkid Rocket Drone.
- New weapons: X-Com Assault Plasma, USP Match (both graphics by Brain_322), Throwing Axes, Spear, Thunder Arcer.
- New items: Handcuffs (by Kozinsky, including handcuffing mechanics), Criminal Records, Dino Egg, Dino Egg Shell.
- New AI chassis: Rocket Drone.
- New terrains: Winter Forest and Winter Marsh (based on tilesets from Bullet Designer and Efrenespartano).
- New missions: Shady Tavern (in 5 variants), Trading with The Wizkids, Cavemen Camping, Dreamscape Necromancer's Dungeon.
- New Ufopedia articles related to the Cult of Apocalypse.
- Black Lotus rationale (by Dragor).
- New facilities: Rat Farm, Sensorium.
- New concept: Strange Creature Breeding (based on concept and sub-mod by Thermite).
- New road maps for Urban Low (by Finnik).
- 2 new Dimension X Base buildings (by Wolverin).
- 7 new events (5 by Sherris, 2 by SparroHawc; all with minor adjustments).
- New Staff Input. New Geoscape theme (from the Amiga AGA version of the original game).
- Monster Terrors will no longer happen after researching Monsters: Final Solution.
- Large Alien Drone can now be disassemblied.
- Improved SCANGs (by Dioxine).
- Psi Defense now depends on Bravery and morale (for good or bad).
- More Swarmids on their paperdoll.
- Enhanced Power Armor and Enforcer graphics (by Wolverin).
- Juggernaut is a bit more resistant to melee attacks.
- New HWP Fusion Bomb sprite (by Brain_322).
- Improved EXALT Master an Bullfrog graphics (by Kato).
- Improved Large Workshop sprite (by Kato).
- Changed Dr. Hadriex' dossier picture, as it was too recognizable.
- Halved Sanity recovery.
- Tritanium is more expensive to produce.
- Electric attacks will no longer provoke self-destruction.
- Ski Resort will not happen after all 4 beginning cults have been resolved.
- Less enemies on the Moon for lower difficulties.
- Added Armored Cars to the Red Dawn HQ.
- Fiddled with Cult of Apocalypse gangs equipment on some missions.
- Sniper rifles never roll low for damage.
- Buffed Sectopod weapon.
- UAC Pistol rebalanced, now works like the UAC Rifle.
- Knockout Grenade is buffed and available earlier.
- Cell Phone can now be used to beat up people.
- Psi-Amp costs slightly tweaked.
- Moved Gillman's electric attack to a special weapon.
- Shotgun batons are no longer AoE.
- Fixed Psiclone damage type.
- Fixed Taser Cannon showing in the Pedia before it's researched.
- Fixed Alien Embassy map generation.
- Flipped vanilla pistol sprite to match other pistols.
- Fixed Scorpoid death animation.
- Various fixes (many thanks to Emil J. Schroeder for help).