The official PC & Mac version of this great boardgame & all 4 DLC's (more maps & variants) on sale again. Last time I posted (end of Feb), it was $2.99 for just the base game. There's also the "Upgrade Pack" of just the DLC for those that already have the digital version of the game.
My Woot! link to the Upgrade Pack: http://deals.woot.com/deals/details/b94e904a-f65c-4fd7-b98d-5b9c9c35805e/ticket-to-ride-upgrade-pack-of-dlc-pc-download-video-games
Regular pricing is $9.99 for base game and $14.96 combined total for the 4 DLC's.
If you didn't buy last time, consider it...this is a great boardgame on the computer.
This is sold as a Steam key and requires a Steam account to use/download/play. You get an individual code for each of the 5 parts (game, 4 expansions).