No Cheat Code System: Unlike San Andreas or Vice City, GTA IV uses In‑Game Phone Numbers for “cheat‑like” effects (see previous answer). No button combos.
Trophy System: Sony requires Trophy disabling for cheats. Rockstar chose to omit traditional cheats entirely rather than manage Trophy flags for each.
How to “Fly” Legitimately in GTA IV
Helicopters:Annihilator (Police, NOOSE – spawn via phone 227‑555‑0147 or steal helipad), Maverick (Civilian – helipads), Buzzard (TBoGT – Weaponized). Best way to fly.
Planes: Not flyable in base GTA IV / TLAD. Flyable in TBoGT:Bucky / P‑996 Lazer (Jet) (Spawn via phone / Multiplayer).
Swing Glitch (Patched): Old glitch (Swingset launch) fixed in Title Updates.
Mods (PC Only):Simple Trainer → “Vehicle Spawner” → “Fly Current Vehicle” (Num 9). Not on PS3.
Liberty City is best seen from a stolen Annihilator at night. Enjoy the view.