Dawn of the Tiberium Age (DTA) is a stand-alone mod that combines Tiberian Dawn (C&C 95) and Red Alert. While classic mode gets as close to the original game-play and balance as possible, Enhanced mode provides improved game balance and a lot of fun new stuff. DTA features many customization options for Skirmish and multiplayer (where you can play as GDI, Nod, Allies and Soviet on over 100 maps), challenging original singleplayer missions, as well as co-op missions. Since this is a stand-alone mod, you don't require anything but the mod itself to be able to play: the original game is not required.
A demonstration of DTA 1.16's Auto-Save and Loading functions.
You can view the video in higher quality at Youtube.com
Note 1: It's already possible to manually save/load multiplayer games in older versions of DTA (from v1.1464 and up), although loading does work more reliably in version 1.16.
Note 2: The auto-save interval depends on the gamespeed. There are are a specific number of frames between every save, which means that the game is saved once every 2 minutes when the game is running at 60 FPS (Fastest) and it's saved once every 3 minutes when the game is running at 40 FPS (Medium).