I.up [美 əp, 英 ʌp]副up often appears as the second element of certain verb structures in English (back up, pick up, sit up, etc). For translations, see the relevant verb entry (back, pick, sit, etc).
Several different power-ups are also available in the game, including a donut that increases speed, bowling pins that can be used as clubs, and bubble gum that slows players down.
The player must outmanoeuvre enemies to avoid damage, but can replenish armour by means of power-ups or by airlifting rescued friendlies or captives to a landing zone.