Here is couple player made test videos of MMO(+RTS?) Crowfall, game where you can build kingdoms by playing Tetris!?!
After Intro/Preview video by TheLazyPeon and some recent Combat Footage by ItsZiz, a siege with voxel destruction then fire damage i.e. confessor playing with some centaurs and some messy PvP on Ranger (stealth/traps).
Briefly - Crowfall is large scale MMO with procedural terrain generation, voxel building & destruction, likely very frequent changes of sex/class/race (account is tied to crow spirit, not the body - so after death you might have to fly and search for new corpse to possess!?) and so on. Good quick intro is it's IGN Wiki, also here's an Imgur album with hundreds of pics and screenshots.
Access to alpha is kinda expensive, but there should be open beta (free tests) before soft launch "next summer", requiring only registration on the site.