The Zerg Wave is the main objective of Braxis Holdout. A Zerg Wave consists of Zerglings, Hydralisks, Banelings, Guardians, and Ultralisks.
The United Earth Directorate used the remote and hostile planet Braxis to conduct experiments on ways to turn the Zerg Swarm into a weapon they could unleash on their enemies. Though the main psi disrupter was destroyed, this space platform's beacons remain fully operational and ready to be used. Capture the beacons and watch what happens when a flood of weaponized Zerg ravages the battlefield.
Braxis Holdout is a two-lane map, with two beacons located in the center and two Zerg holding pens located in each lane, one for each team. Periodically, the two beacons and one pen from each lane (belonging to opposite teams) will activate. When both beacons are held by the same team, that team's pen will begin to fill with Zerg. When one team's pen is full, the Zerg are released to attack down their respective lanes.
The Zerg Wave consists of five different Zerg species:
Weak melee attack unit released in large numbers to overwhelm defenses.
You always have 10 Zerglings to start with (10 maximum).
Suicide unit that explodes to deal damage against a building or Hero.
Every 10% spawns a new Baneling (10 maximum).
Ranged attack unit with moderately high damage.
You always have 2 Hydralisks to start with. Every 25% spawns a new Hydralisk (6 maximum).
Powerful melee attack unit that can withstand heavy damage.
You always have 1 Ultralisk to start with. 50% spawns a new Ultralisk (3 maximum). While attacking, Ultralisks spawn Drop Pods with 3 Zerglings and 1 Hydralisk (can occur once every 13 seconds; 3 maximum).
Long-ranged attacker that can outrange base defenses.
You always have 1 Guardian to start with. Every 35% spawns a new Guardian. While attacking, Guardians spawn Drop Pods with 3 Zerglings and 1 Hydralisk (can occur once every 13 seconds; 3 maximum).
Not counting the Banelings, the relevant percentages are: 25%, 35%, 50%, 70%, 75%, 100%.