Re: Is it at all possible to play titanfall as a single player (not multiplayer online)

is the training part a lengthy campaign???

No. Titanfall is multiplayer only, even the campaign is multiplayer.

No, the game is entirely multiplayer. There is a "campaign", but it's a non-traditional model where the plot is told through radio communications and mission briefings and even some in-game bits, while you are playing standard multiplayer matches. So you'll go into a lobby, and during the 80 second countdown hear a briefing that will both inform you of your objectives and fill in some story beats. Then, in the mission itself, usually some NPC interaction can be seen as you head to the actual fight from your spawn, and during the course of the match, radio chatter also progresses things.

When you finish the campaign, you then switch to the other team, and play through it as whatever team you were fighting against previously.

It's kind of cool, and certainly interesting, but it doesn't go far enough with the idea until the last few missions to really be great, if you ask me. That said, some of the things they do in the later missions are really, really cool, and experiencing them in a multiplayer setting is nuts (in a good way.)

Plus, it made me try the Attrition gametype, something I probably would have never played otherwise.