The playtest in January were successfull. There are new Multiplayer modes: Koop and Versus.
Multiplayer Announcement Trailer:
Co-op
In co-op mode, you can play together with up to four players. As in singleplayer, the goal is to complete all levels up to the final boss and defeat it. The host chooses the faction, and you can choose from four classes.
Versus
In Versus mode, you compete against each other. Up to 4 vs. 4 matches are possible. All classes are available to choose from.
Changelog
Here are the changes for the new modes and some fixes.
Version 1.5.1
Fixes
Wrong translation on credits view
Game stats were not reset after leaving
List of available upgrades were out of sync (host <-> clients)
Endscreen was not shown after retry
Version 1.5
Fixes and some improvements
Changes
Path is highlighted with thicker lines
Added endless mode to koop
Fixes
Displayed version on Host view was wrong
Wrong faction on singleplayer
Wrong upgrade selection on client
Data on koop endscreen were not correct
Level ups were triggered on respawn
Version 1.4
New modes (Koop and Versus)
Changes
Implemented Koop mode for up to 4 players
Implemented Versus mode for up to 8 players
Changed auto aim to aim the closest target
Reduced level multiplier for enemies from 10% to 5%
Added difficulty parameter to calculate level multiplier
Fixes
Faction for monsters was wrong
Health bars were hidden behind top wall
Interaction icon for endless mode