Complex sentence: The Nintendo 3DS version of "E.X. Troopers" lacks online services for multiplayer, but supports local play and a bonus "AR Marker" feature which activates in response to images from the game's website.
Split into simpler sentences: The Nintendo 3DS version of "E.X. Troopers" lacks online services for multiplayer, but supports local play. This version also features an "AR Marker" feature which activates in response to images on the game's website.