On most of the maps, depending on the game modes and mutators used, you will find the following items.
HEALTH
Every time you respawn, you start with 100 HP. During the battle, you will lose health point due to damage received from other players. To heal yourself, you can pick items up. No matter how many items you pick, you will not be able to cross the limit of 150 HP.
Heal: +5 HP
Respawn Time: 10 seconds
Heal: +25 HP
Respawn Time: 30 seconds
Heal: +50 HP
Respawn Time: 45 seconds
Heal: +100 HP
Respawn Time: 60 seconds
STAMINA
Using specific movements result in decreasing your level of stamina. To fuel it, you need to either wait for it to recharge on its own, or use the pickups.
Yellow energy pickup increases your level of stamina by 15% and spawns every 5 seconds.
CARNAGE
Each weapon has specific criteria on the damage dealt while hitting a player in every part of the skin.
With the Carnage pickup, the damage dealt is three times the ones usually done with the weapon. It spawns every 120 seconds but spawns the first time at the 90th seconds of the game (unlike the other items).