FRAG has to be one of my favorite games.  It could be considered the game that got me into board games. It is a toss up between a board game, card game, and miniatures game, needing all three to bring the game to life.

In Frag each player will take a single character to be their "online" persona in a Doom styled shooter game.  run around the field collecting weapons and ammo and "FRAG" your opponents.  We generally play to somewhere between 3 to 5 kills.  There are all sorts of weapons, from the limitless ammo of the original pistol players start with, leading up to a flamethrower, gatling machine gun, even nuclear missile launchers.

Variations to the main rules include capture the flag and team gaming, basically if you can do it in DOOM Unreal tournament of Call of Duty you can expand it to fit into FRAG.

I have to give FRAG an 8 out of 10