We all know to move up to a wall when Missiles are coming, but what about shooting from cover?
Typically people move their bots sideways from cover, fire, then move straight back to cover as below:
This isn't very effective. Why? Because as you move from cover and shoot, you expose all of your bot, the bot comes to a stop, the legs turn, then you start to move back to cover. In this time you are exposing yourself to return fire and if you are a light vs a heavy, this is bad news! Aphids will also deal full damage to a light bot as it stops to step sideways again, so you want to avoid this.
Peeking is the correct way to use cover and can allow you take down much stronger and healthier bots.
With this method, you start a little distance from the cover and walk in a circle whilst facing the enemy. You aim to have just the side of your bot stick out of cover as you are walking the circle, meaning you can fire side weapons with almost nothing of your bot exposed. As your bot is constantly in motion, it never stops so you very quickly in cover again.
Peeking works with any bot and is very effective with bots that have weapons sticking out on one side, such as a Cossack, Boa or Golem.
You can see around the corner by turning your robot to the 60 degrees away from the corner. Using this, you can see the enemy in the very edge of your screen without them seeing you. However, this leaves you vulnerable to incoming splash attacks.
When someone peeks around a corner, they are mostly protected from projectiles but are still fully vulnerable to splash damage. Thus rocket setups such as death buttons can take advantage of unsuspecting peekers to score massive damage. It is not advised to fire around corners if the enemy has rocket weapons.
Sneaking up to a peeker with a fast knife-fighter can be very effective, as they will most likely have all of their attention and ammunition on their target.