Cs 16 Level System Plugin _best_ -

// Main settings cs16_level_enabled 1 cs16_xp_kill 15 cs16_xp_headshot_bonus 5 cs16_xp_bomb_plant 30 cs16_xp_round_win 20 cs16_max_level 30 cs16_hp_per_level 2 // +2 HP per level cs16_save_type 1 // 0 = no save, 1 = SQLite, 2 = MySQL

The plugin must define XP sources to avoid unearned progression: cs 16 level system plugin