Online co-op - added support for up to two players.
Lobbies - added public, private, and friends-only sessions.
Lobby codes - added the option to copy and share a lobby code.
Teammate revival - added a limited window to revive downed teammates.
Checkpoint respawns - dead players return when the surviving teammate reaches the next checkpoint.
Co-op game over - the session ends in defeat when no players remain standing.
Scene compilation - compiled the map using the new s&box scene compilation tool.
Rendering - reduced draw calls from 1,872 to 416 in the measured scene comparison.
Global illumination - adapted our custom lighting system to work with scene compilation.
Boss readability - updated bosses and mini-bosses with a black-and-red color scheme to distinguish them from regular enemies.