Here is the full list of all 22 Shark Attack Deathmatch 2 achievements.
Kill 5 players in a row without dying during Deathmatch (must be 4 or more players in the match)
Completed a Deathmatch game. (public games only)
Last 10 Min in Survival
Survive the full 15 min !
Kill someone whilst completely blinded by another players flash grenade
Take the lead to win the match in the last 15 seconds!
Kill 7 or more unique players in a single match of Deathmatch
Hold the "furthest shot" at the end of the match (must be 4 or more players in the match)
Achieved Rank 2 in a public Deathmatch game.
Achieved Rank 3 in a public Deathmatch game.
Achieved Rank 4 in a public Deathmatch game.
Achieved Rank 5 in a public Deathmatch game.
Achieved Rank 6 in a public Deathmatch game.
Achieved Rank 7 in a public Deathmatch game.
Achieved Rank 8 in a public Deathmatch game.
Achieved Rank 9 in a public Deathmatch game.
Achieved Rank 10 in a public Deathmatch game.
Achieved Rank 11 in a public Deathmatch game.
Achieved Rank 12 in a public Deathmatch game.
Achieved Rank 14 in a public Deathmatch game.
Achieved Rank 15 in a public Deathmatch game. You are at the pinnacle of your game!