Hosting opens a lobby: see who has joined, chat, and start the game when ready. The results screen can take everyone back to the lobby.
Versus has its own courtyard arena, with a central block and walls that open on every side.
Versus guns are pickups: everyone starts with the pistol, and the other nine guns wait around the map, the heaviest in the gate alcoves. A taken gun returns after 12 seconds, or 20 for the heavy ones.
Volume sliders for sound effects and music in Settings, plus Mute All.
Each kind of pickup has its own pitch.
The Skitter, Leech and Phage Crawler are now the Nanospider, Neuroleech and Macrophage.
Ammo, health, shield and sample pickups now make a sound.
The XP Molecule pickup sound plays even when it triggers a level-up.
Chat reads keys as a US keyboard layout.