For a fun little sandbox experience,
Train Frontier Express could be exactly what you desire.
INDIEGAMES.COM

A remarkably fully featured offering.
EUROGAMER

A nice break from all the side-scrolling Indie games.
KOTAKU XBLIG Pick

WINNER 2011
Indie Games Summer Uprising

[s1e8] Don't Go Wasting Your Emotion Review

You can BUILD, RIDE, SHARE with friends in a this landscape building and rail riding good time.

Sculpt your own landscapes, then HOP ONLINE to share your map, take a ride, or build together in REALTIME.

Train Frontier is both STYLIZED and FRIENDLY, taking inspiration from MODEL TRAIN SETS, while eschewing the more complex train sim format.

[s1e8] Don't Go Wasting Your Emotion Review

Pippa brings her boyfriend, Wrigley , to lunch with her father. While the lunch goes well, it highlights Pippa's "reserved" nature and her struggle to feel like she truly belongs.

It is revealed that Pippa often fakes her enthusiasm and orgasms with Wrigley because she feels lucky to have been "chosen" by someone like him and fears losing that validation. [S1E8] Don't Go Wasting Your Emotion

There are subtle hints regarding Pippa's authentic self, including a potential romantic interest in Lucy’s roommate, Charlie , suggesting she is more attracted to women than she has let on to her friends. Lucy and Stephen's Toxic Bond Pippa brings her boyfriend, Wrigley , to lunch