A new style of word game, in which players guess a word based on what's in common between four pictures, has been making its way up the app store charts on various platforms. The game concept, usually termed "4 Pics 1 Word", has been implemented by multiple developers on multiple platforms, although the initial iOs and Android versions seems to have originated with German developer LOTUM.
LOTUM has not created a Windows Phone version of their game, but several other developers have cloned the concept and produced their own Windows Phone version of the game. The two highest rated version are 4 Pics 1 Word by Deveci Games and 4 Pics 1 Word by Denham Software, but there are also a number of others available as free downloads.
All the games provide a limited number of letters from which to spell your guess and offer various hints or cheats (e.g. remove letters, show first letter), which generally have some cost (e.g. in coins). Some of the games have ways of buying or obtaining more coins, but in other you'll have to be patient or keep guessing.
The game style is somewhat reminiscent of Zynga's Draw Something, but you're guessing against a pre-defined set of pictures, rather than a human opponent. As a result the games don't have the same social appeal as Draw Something, but are still a fun way to wile away a few minutes.