The free-to-play PC Indie title Ace of Spades uses the same signature voxel-style graphics that is a feature prominent in the mega-popular Indie sandbox block-builder Minecraft.
Ace of Spades however is a free online multiplayer game that utilizes FPS dynamics to go head-to-head with other players in online deathmatches and other modes of play. This title also has a WWI theme to it.
The graphics are low res and charming and the gameplay has been describe as entertaining. The game is available to download in beta form and there is also a forum community dedicated tot his title.