XCOM 2 WOTC is my favourite. The variety of classes and skills, procedural maps, and randomized strategy layer all give it much more replayability than EU/EW, and WOTC improves a lot of things over the base game, including fewer missions with timers. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.