Feral has announced via Twitter and subsequently mailed out a press release that Tomb Raider is coming to Linux this spring. Tomb Raider will be officially supported on SteamOS and Ubuntu.
The retail price on the game will be $19.99 USD. More details on the game can be found via the Feral site. The Linux system requirements have yet to be published. Tomb Raider does have an integrated benchmark mode, but it remains to be seen if it will be included as part of the port to Linux as some past Feral games have seen their benchmark functionality absent. If it's there and meets my requirements for being a good benchmark, I'll be delivering many Tomb Raider Linux benchmarks once released.