PlayStation
If you own "Tarzan" for the PlayStation, you have to first activate a cheat menu before you can utilize any cheats. At the main menu of the game, push left, left, right, right, up, down, left, right, up, up, down and down. From here, you can utilize two cheats: one that allows you to select any level within the game you want, and another that grants you unlimited lives. For level select, press L1, R1, L1, R1, L1, R1, L1, R1, L2 and R2. For unlimited lives, press L1, R1, L2, R2, L1, R1, L2 and R2.
PC Levels
If you own "Tarzan" for the PC, two cheats exist that can help you skip a level -- or start at any level you desire. Unlike the PlayStation version, you can enter these cheats at anytime during gameplay by using your keyboard. Enter the cheat "ststage" and you will be able to play any level you wish, including levels you have already beaten. Enter "stlevel" and you will skip to the end of any level that you are currently playing and advance to the next one.
Animals And People
During the "Tarzan" game, animals will try to attack and kill you. However, you can enter a cheat which allows you to kill all "bad" animals without actually fighting them on the PC. During gameplay, enter "stanimals" and all dangerous animals within the level will be killed. If you enter "stjane," you will transform from Tarzan into the Jane character. If you wish to turn from Jane back into Tarzan, simply enter "sttarzan" and you will.
Other PC Options
If you are playing "Tarzan" on your PC and you want to save your game, simply enter "stsave," and all progress will be saved. If you wish to return to a saved game later on, simply enter "stload" and you will return to the point of action you left off on. If "Tarzan" isn't bright enough for you -- color wise -- you can enter a cheat to reverse the problem. Simply enter "stcolour" during gameplay and the visuals onscreen will become brighter.