Roar
From the MEGA Wiki
Roar is a sonic blast. Press 
in Siege View and your Titan roars at whatever is in front of it. It panics troops and knocks helicopters out of the sky.
Usage
Roar works well against 
Helicopters, whose fire suppresses hostile Titans, and against groups of 
Ground Troops guarding a city. In a duel the same key is used to Block.
Other Titan moves
| Move | Input | What it does |
|---|---|---|
 Slash | | Strike combo. Keep clicking to chain hits. |
 Special | | Your Titan's elemental attack. Some need a second click to confirm. |
 Sprint | | Hold while moving. Uses stamina. Stepping on vehicles crushes them. |
 Smash | | Seismic slam: a shockwave through every nearby building. |
| Roar | | Sonic blast ahead: panics troops and knocks helicopters out of the sky. |
Roar
The ability ribbon
| Titan moves | Slash · Special · Sprint · Smash · Roar |
|---|---|
| Specials |  Earthbreaker ·  Tidal surge ·  Furnace roar ·  Rampage roll ·  Code breath |
| Duel moves |  Punch · Kick · Block · Jump · Dash · Uppercut · Sweep |
| Upgrades |  Far Sight · Long Strides · Quick Claws · Titan Growth · Crushing Blows · Armored Hide · Rapid Regeneration |