Team Sabre Operations is an enhancement mod for Delta Force Black Hawk Down and its Team Sabre expansion. It's meant to fix and improve the stock game's sounds, art style and gameplay. It also provides additional content for map makers in order to expand the original experience.
The multiplayer, team deathmatch map recovered from the v0.0.3 Beta demo of Delta Force Black Hawk Down has been converted for use in the mod. It's named Night Limits (the name intended by the author was City Limits Night), and features buildings, vehicles and terrain tiles from the Beta version of the game. This specific night version of the map features a layout much closer to the Mean Streets multiplayer map of the original game, although that one is set during daytime.
The environment is very dark by design, so it starts with night vision being applied to the player by default (not shown by the screenshot).