For the actual game series:
Titanfall is a fast paced shooter game with absolutely insane movement mechanics that allow players to zoom around the map very quickly. Maps that would typically be medium sized for CoD are sometimes considered small in game. The game’s story is about an ongoing war between a company (or country) called the IMC and the Frontier Militia. The main draw in the game is that you can switch from human to human combat to Titan to Titan combat in one match. To get your Titan, you need to complete a series of either objectives or get kills by doing either PvP or PvE (in some modes PvE and Titans are unavailable, though in one mode only uses titans) though you also earn points for your Titan over time, you’ll likely have at least one Titan use before the match ends. PvE kills don’t count towards your regular kill count (and less points for your Titan) unless you’re doing frontier defense, the only Co-op mode. Once you have your Titan, you now have a giant metal robot that you can control, or leave it and have the AI help you (although with less performance than you controlling it for game balancing). In Titanfall 2 you have multiple Titan Classes: Ion, Scorch, Northstar, Ronin, Tone, Legion, and Monarch. The Brute class Titan seen in the story is not playable in multiplayer matches. These titans you can customize your kit’s abilities and looks of your Titan, but your Titan will mostly stay the same though some strategies may differ depending on what abilities you selected for your class. Titanfall 1 had different customization mechanics where you had Stryder (light), Atlas (medium), and Ogre (heavy) class Titans that had rechargeable shields and you can customize almost everything down to the actual weapon your Titan uses. The lore reason this didn’t carry over to Titanfall 2 was that the IMC lost many of it’s production facilities and the classes in Titanfall 2 were to keep things resource efficient. The Frontier Militia could not buy titans and often raided IMC facilities to get them. Titans have core abilities that are unique to each Titan. For example, Ion has laser a core, which will fire a beam that deals massive damage in the direction you are looking for several seconds. You cannot change a titan’s core ability in Titanfall 2 and I do not know for Titanfall 1 if you can or not. The campaign in Titanfall 2 follows the story of Pilot Jack Cooper and BT-7274.
