Zip
Zip is described in Tomb Raider: Legend as Lara's right-hand man and he is also described as knowing about "all things geeky".
He first appears in Tomb Raider: Chronicles as an extroverted technical genius with a bubbly sense of humour. When Lara breaks into Von Croy's building to acquire the Iris, he communicates with her via a headset and advises her on what to do and how to navigate through the building, often cracking jokes and bickering with Lara in between doing so.
He re-appears in Tomb Raider: Legend and plays a similar role as in his original appearance, communicating with Lara via a headset once again. At one point he and Alister are attacked by Amanda as she breaks into Lara's mansion. He and Alister help Lara from a tech van when she find King Arthur's tomb. Zip is somewhat less of an extrovert in Legend, with more of a subtle personality - albeit retaining the tendency to crack jokes during missions.
He next appears in Tomb Raider: Underworld. He communicates with Lara via a laptop at the start of the first and second level. When Lara returns from Thailand, she, Zip, Alister and Winston find a secret passage in the "Tech Room" that leads to the Croft family Crypt, where Lara discovers a secret passage at her grandfather's coffin. While Lara is investigating this, Zip along with Winston are attacked by a creature that looks very similar to Lara. They are able to escape this doppelgänger and try to escape Croft Manor, which is caught on fire, through the main doors. The real Lara then appears, this causes Zip to shoot at her, mistaking her for the doppelgänger. Winston stops him, telling him Lara and the doppelgänger are two different people. Zip then escapes the mansion with Winston and waits with him, until Lara brings Alister's dead body from the mansion. Lara announces that she is going to Mexico to find Thor's belt, then Thor's Hammer and then kill Natla who created the doppelgänger who killed Alister. Zip later gives Lara the co-ordinates to the ruins where she finds Thor's Hammer.
Read more about this topic: Recurring Characters In The Tomb Raider Game Series