Actually it's the XCom Enemy Unknown Complete Pack, so it includes the DLCs too. I've never played it but Rince was a fan of I think this and the later game. I like turn based combat (it matches my speed of thought) so I might swallow the 20gb download and give it a go.

https://www.gog.com/game/xcom_enemy_unk ... plete_pack

Played and finished both. I've always enjoyed X-com since the very first PlayStation instalment. Probably not every ones cup of tea though