my gosh, you worked on Sins of a Solar Empire and Deus Ex art? that is AWESOME! Specially Deus Ex, seriously that game has to be the MOST beautiffull (on its design and visuals) game on history, you should be proud of such awesome games you have worked on. CONGRATULATIONS
wikipedia is your friend on this one. But basically: Deus Ex is a game series. It's a dark dystopian cyberpunk RPG/FPS hybrid thing. The games are all about choice. The story stays largely the same, but it's up to you to choose how you go through with it. Do you blast your way through, Duke Nukem style. Or do you sneak about like Sam Fisher. You may even be able to talk your way out of a firefight. There's a lot to these games that you have to play to understand. It's not for everyone, granted, but, for example, the first Deus Ex is considered a classic and a "must play"