Sniper is typically used at long-range as it does more damage the further away the enemy is from the player horizontally. Typically used by higher skilled player as it has a tiny shot radius.
Although very similar to Sniper, Sub-Sniper allows for the sniper to be shot from both above and below ground, while also increasing the maximum damage to 120 and minimum to 48.
Unlike the last two tiers, Smart Snipe requires considerably less skill. This weapon fires 10 harmless projectiles which tag the enemy if hit, if one of these projectiles does hits an enemy, another projectile is fired along the same trajectory as the projectile that tagged the enemy. The first 5 projectiles will vary in angles, the second set will vary in power. It will deal 40-100 damage depending on the distance from the player. But be warned, it won't adjust to terrain changes in between the time of the tracker hitting, and the sniper hitting!