Zealots are strong against units such as immortals, zerglings, and hydralisks, and weak against hellions, roaches, and banelings. Though they do a total of sixteen damage, their attack is treated as two attacks doing eight damage each. This means that all armor (and armor upgrades) are twice as effective against zealots. Their charge ability is autocast by default, but this can be turned off.
The zealot charges towards a target enemy unit or structure, boosting its speed to 8.47 for the duration. The zealot must have clear ground pathing to their target to reach it. Also increases the zealot's normal movement speed to 4.72.
In the early stages of StarCraft II: Wings of Liberty, the zealot was to be replaced by a ranged unit named the adept. However, this was dropped, as the team wanted to preserve the base identity of each race that players remembered. The adept would later be added in Legacy of the Void as its own unit.
The zealots in StarCraft II received a cosmetic overhaul from their predecessors, but their animations remained the same. Fans reacted negatively to psi-blades being color-correspondent in accordance with team color, but a compromise was never reached.
Glenn Rane pitched a concept where the zealot's psi-blade count would be increased to 4. However, this didn't make it through to the final game.
During the Legacy of the Void beta, the zealot's charge ability dealt 30 damage on impact. The developers agreed with gamer feedback that this was too high. In truth, the buff was unintentional, as it was the result of an internal bug where zealots were not always dealing damage on charge. The bug was dealt with before the release of the subsequent patch, but the developers forgot to double check how this affected the game. The buff was removed soon afterwards.
While playing as Zerg, warp in a Zealot in a Melee game.
The easiest way to do this is play as zerg vs a friend playing as protoss. Also possible is playing zerg with a protoss ally; the ally leaves the game and one can use his gateway to make a zealot. Alternatively, play against a easy or very easy protoss AI. Destroy all of the opponent's buildings except one, without hurting the probes. Use an infestor to infest a probe, and use it to build a nexus (and a pylon if there's time enough). From this nexus, build a probe, and warp in a pylon, then a gateway. Then construct a zealot.