A 35-level single player major conversion.
This scenario is difficult and action-packed; it features a full arsenal of new, powerful weapons, and more threatening enemies than you could ever want.
1.4 has new Lua features like a performance overlay, weapon buffs, a lot of little bug fixes; it also applies ammo capacity limits on Total Carnage. Requires Aleph One 1.5 or newer, probably!
Adds graphics plugins by W'rkncacnter to improve weapons in hand and landscapes. On the linked webpage you can also find a download just for the plugins, which you should be able to drop into an existing 1.4.1 installation.
This is a modification of Hopper's amazing XBLA HUD for Marathon 2 and Infinity, this time designed for Marathon Phoenix.
Note: Secret skull information is displayed when you take out your fists.
Initial release. Includes support for secret skulls and keycards.