This may sound like a stupid idea but my suggestion is that the game should have an announcer. If you don't know what I'm talking about, It's like in the game Halo when you take the flag the announcer would say "FLAG STOLEN!" or if you get a large amount of kills simultaneously it would say "KILLING SPREE!" or "KILLTACULAR!". Some ideas for the announcers lines could be, "THE ENEMY/FRIENDLY TEAM HAS THE INTEL!", "THE ENEMY/FRIENDLY TEAM HAS CAPTURED THE INTEL!", also maybe when you get a headshot it would say "HEADSHOT!" and when you get a spade kill it would say "HUMILIATION!", maybe when there are 10 seconds left of a match it would say "10, 9, 8, 7, 6, 5, 4, 3, 2, 1, GAME OVER!
Here's the Halo announcer as an example: http://www.youtube.com/watch?v=FVbR8_ebu1k