KILL

A number of kicks is chosen; for example, two-hit kill uses two hits. Players try to make two consecutive hits, after which they can kick the footbag at another player. If the footbag hits the player, he or she is "killed" and out of the game. However, if the player successfully hits the footbag, the footbag is put back into play and the player is not out.
Kill differs from peg in that in kill, players have to make (for example) two consecutive hits by themselves before they can "kill" another player; in peg, all players contribute to this number. In both games, higher numbers of hits make the game more challenging.
Kill can also be played communitively, meaning that just one person doesn't have to make all the kicks and anyone can go for the kill. So for example in 3 hit, 3 different people can get a kick then after the third hit anyone can kick the footbag at any other person. [WARNING: accidents do occur and people can get kicked in the scramble for the footbag. So don't get mad, this is a fun game, but this version also makes things a little more interestin.]

BLOOD

Blood is similar to peg or kill. After a predetermined number of kicks the footbag is "live". When the footbag is "live" it is kicked at another player. Whoever the footbag hits last before it hits the ground receives one "out", even if this player is the one who kicked it [if they miss their target]. After a player has received the predetermined number of "outs" [usually 2 or 3 depending on the number of people playing] that player must leave the game. The last player remaining wins the game.