"The Grenadier is a big and powerful ranged unit that deals area damage - rather inaccurately! Be careful about sending troops in front of him, as they might get caught in a grenade blast."
Summary
■The Grenadier is unlocked at Headquarters level 16, making it the current last troop to unlock.
■He throws grenades that can do splash damage.
■His throws are very inaccurate but can be very long.
■The grenades can damage your other Troops.
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Offensive Strategy
Although the Grenadier's range is shorter than that of Sniper Towers and Boom Cannons, their inaccurate shots and splash damage allow them to attack these defenses without getting hit provided that they are targeting another building. Therefore, it is not a good idea to directly flare onto defenses.
Upgrade Differences
There are no visible changes between levels, but each upgrade increases the Grenadier's hitpoints (by 6%), DPS (by 7.5%), and training cost (by 1000 gold).
Trivia
■His beret suggests special-operations training.
■His grenades can set off Mines and Boom Mines.
■The training cost of a Grenadier is the same as a Tank of equal level. However, since a Grenadier has fewer unit size than a Tank, it's the most expensive troop to fill up a fully upgraded set of Landing Crafts despite having fewer levels than Tanks (544,000 gold for maximum level Grenadiers; maximum level Tanks' 528,000 is a close second).
Note that Grenadier are weak against Rocket Launchers , Boom canon and Sniper towers.
Shocker and cannon range also can reach to hit them too
This is a video how the player take out a Lv 44 PVP base :
Are Grenadier good at taking out HQ on their own ? Check it out
to see how inaccurate their throwing are....