TITANS is the huge stand-alone expansion to the already massive-scale RTS Planetary Annihilation, which includes the base game and adds tons of new features:

Devastate your enemies with 5 massive Titan-class super units like the earth-shaking Atlas bot and lightning-wielding Zeus airship!

Planetary Annihilation TITANS Fusion-CODEX
Expand your strategic arsenal with 18 new units such as versatile Hover Tanks, indomitable Orbital Battleships, and voracious Nanobot Swarms!

Elevate your game with new planets that feature multi-level terrain available in both single and multiplayer. Get up to speed faster with a new, streamlined tutorial experience, then take your game to the next level with the new Bounty Mode option for AI skirmish and multiplayer,
Including everything you loved about Planetary Annihilation:

Epic Scale - Command armies with numbers in the thousands across multiple planets on land, sea, air, and even in orbit.
Epic Multiplayer - Play with up to ten friends (or enemies) in massive free-for-all and team-based matches. Or, compete in the 1v1 ranked ladder.
Epic Single-Player - Galactic War is a twist on traditional real-time strategy campaigns that has players battling across a dynamic galaxy filled with procedurally-generated content.
Smash Planets - End games by destroying entire planets with giant lasers, asteroid collisions, and the new planet-splitting Ragnarok Titan!
Advanced Command And Control - Automate your armies with intuitive controls and features, allowing you to create and manage massive armies and production lines with ease across multiple fronts on multiple planets at once!
Instant Replays - View in-match recordings in real-time while matches are in progress. See when a battle turned by rewinding the game to any point, and use Play From Here to turn it back in your favor.
Local Server - Host LAN games with up to 32 players using the included DRM free local server:https://planetaryannihilation.com/guides/hosting-a-local-server/*Must meet Minimum System Requirements for offline play

Planetary Annihilation TITANS Fusion-CODEX
STEAM

SYSTEM REQUIREMENTS
MINIMUM:

Requires a 64-bit processor and operating system
OS: Windows 7 Service Pack 1 64 bit
Processor: MODERN Quad Core Processor
Memory: 8 GB RAM
Graphics: Shader 3.0 / OpenGL 3.2 +, 1 GB GPU RAM
DirectX: Version 9.0c
Network: Broadband Internet connection
Storage: 5 GB available space
Additional Notes: 32 bit, Windows XP and Vista are NOT supported.

RECOMMENDED:

Requires a 64-bit processor and operating system
OS: Windows 10 64-bit
Processor: MODERN Quad Core Processor
Memory: 12 GB RAM
Graphics: Dedicated Graphics Chip (Not Integrated) / OpenGL 3.2+, 1 GB GPU RAM
DirectX: Version 9.0c
Network: Broadband Internet connection
Storage: 7 GB available space
Additional Notes: 32 bit, Windows XP and Vista are NOT supported.