There are hidden bonus rounds in every level except for the final level, the boss levels, and the Planet X world.
Frankie and Heli
Find the Remote Control for Grave Danger and learn the basic moves. A bonus level can be reached by locating the camera in the middle of the level. Go up as high as possible from that camera (jump up and stick to the walls). Ride the moving platforms to the right while jumping onto the ceiling protrusions along the way. On the last platform is a warp to the bonus round. This level also contains a path that leads to a row of warps to all of the bonus levels in the game. To find it, locate the screen that contains a guillotine on top of a cliff that is faced with spikes along it's right edge. Three golden flies are clustered in an arc pattern towards an opening above the spikes. Enter that opening and use the warp that is located inside. After warping, break a series of three blocks to reveal more golden flies. To the right is a warp next to a spiked cliff that has an extra life power-up on top. From the location of the power-up, jump up to the left and hold Up. There is a hidden warp above the visible screen. Gex will enter it when he disappears from view. This warp will lead to a long line of warps that will allow access to all the bonus stages.
Find the Remote Control for Tomato Soup. A bonus level can be reached by locating a section of platforms, one of which has a Franken-gecko. The platform right after that has two Heli-teevees floating one on top of the other. Super-spring bounce off the top Heli-teevee to reach the platform above, which has a warp to the bonus round.
Find the Remote Control for Disco Inferno. There is a Video Tape on this level. Since this is an easy level to complete, always return here to save your game. A bonus level can be reached by locating the point close to the end of the level, where there are two pillars that must jumped on to cross water. Right before those two pillars is a short section of collapsing floor prefaced by a longer section of collapsing floor with several pillars. Drop through the smaller section. Gex will drop to the bottom of a pit, where there is a Killer Tomato to whip. Then jump up to the left to find the warp to the bonus round.
Find the Remote Control for Spin -n- Puke. There is a Video Tape on this level.
Spin -n- Puke (Boss Level)
Defeat the Boss. Obtain the Remote Control to Pow! Tail whip the skulls to get rid of a some of them. Then, whack the Boss when the skulls fly away. Avoid the sides of the screen, as they will crush Gex. When Gex is hit, tail whip a gecko paw power-up. Avoid the green puke when the Boss turns ugly.
Bonus round tip
Jump when the stump recoils before spitting the first skull, and then jump when the second skull matches maximum height. Hit the first skull before it reaches the top to allow plenty of time to hit the second skull.
Jump on the pianos and whip your tail for a note to ride upon.
Find the Remote Control for Twin Towers. There is a Video Tape on this level.
Find the Remote Control for Rock It!. There is a Video Tape on this level. A bonus level can be reached by locating an arrow that points to the warp from two floating squares. Drop down into the bonus level.
Find the Remote Controls for Knock! Knock! and The Flatulator. A bonus level can be reached by locating the third rocket, which is also the first blue one. Wait until it launches, then drop straight down from where it emerges. The warp to the bonus round is located there.
There is no Remote Control on this level. A bonus level can be reached by locating the following location on the "night" side. Look for a group of tall platforms with spikes all along the sides, with two golden flies above each platform. In the space between two of the platforms are two punching boxes. In the space to the left of the boxes is a full health power-up. The warp to the bonus round is located in the space to the left of power-up.
The Flatulator (Boss Level)
Defeat the Boss. Obtain the Remote Control for Feeding Frenzy. Dodge the Boss' lunges by jumping over him. Use his sounds to time the jumps, and try to stay in the middle. After his fourth lunge, go to the right side of the screen and duck. After the Boss launches in the air, climb to the top and tail whip the anvils on the ceiling, timing their fall to hit him. Ten anvils must hit the Boss before he is defeated.
Bonus round tip
Go up the right side first. Switch to the left on the seventh bounce, then drift a bit to reach the golden fly in the middle. On the left side, wait until Gex has enough room to clear the center block, move right to catch the golden fly on that side, then drift back up on the right side to the block that moves up and down. Go up the left side, and stay there until Gex reaches the next block. Clear it and drift down to the right to get the golden fly, then straight up to the right. Clear the center block with enough height so Gex does not land on it, and drift down to the last two golden flies and piece of the remote.
Find the Remote Control for Congo Chaos. Gex can swim without resurfacing to breathe. A bonus round can be reached by locating the camera. Drop under the wooden bridge by falling through the collapsing section. There is a secret opening that leads inside and underneath the land to the left. A hidden warp to the bonus round is located there.
Find the Remote Control for Jungle Gym. Once Gex gets to the end, the scrolling stops and he can go back to explore. There is quite a bit to be found by going backwards. He can go back as far as the long spiked pit that must jumped over (the one with the crumbling blocks). The scrolling will resume if Gex goes past this point. A bonus round can be reached by locating the section that contains a square group of spikeball traps with a gecko paw power-up in the center. There are two blocks on top of one another next to the spikeball traps. Break the bottom block, then jump on the top block. The warp to the bonus round is located just to the left of that block.
Jungle Gym (Boss Level)
Defeat the Boss. Obtain the Remote Control for Sumo City. Gex must climb to the top of the level. Except for a few critical jumps, most of the jumps can be made without pressing LS to get a running start. Keep Gex moving quickly and the Boss will not be able to catch him. Remember where the holes are and try to avoid their vicinity.
Bonus round tip
Gex does not have to tail whip all of the golden flies. Hitting them with his body also works. Learn the drop pattern.
Find the Remote Control for Fish Bait. There is a Video Tape on this level. A bonus round can be reached by locating the sumo wrestler at the end of the level. To the left, almost off the screen, is a platform that contains the warp. Super-spring jump off the floating eyeball to reach it.
Find the Remote Control for Chop Chop. Gex can swim without resurfacing to breathe. A bonus round can be reached by locating a section that contains water that changes from clean to poisoned. This is found after the last camera, a squid, and spitting statues. Look for a pool of normal water to the left, a pool of lava in the middle, and the changing water to the right. Climb on the back wall (with Gex's back facing the screen), get close to the lava as possible, and drop down. Dropping down from too high a height will kill Gex. The lava will become a pool of normal water that contains extra life power-ups as well as a warp.
Find the Remote Control for Toxic Turtle. A bonus round can be reached by locating the set of falling platforms that will let Gex reach one of two warps, depending on how quickly he can jump up the platforms. There is a third warp above those two, which will lead to the bonus stage. To get there, super-spring jump off the eyeball that floats left and right above the first of the falling platforms, without making the platforms fall. By clinging and crawling on the ceiling, Gex will be able to jump to the third warp.
Toxic Turtle (Boss Level
Defeat the spiked turtle. Gain the Remote Control to Rez Knight Fever. Climb to the top of the right side wall, and hide there by holding Right until the Boss is in position for a tail bounce. Tail bounce or tail whip the Boss when his position is right. Jump back on the wall and hide when the Boss starts to shoot his weapons.
Bonus round tip
Hold the shoulder button to run during the entire bonus round.
Rez Knight Fever
Find the Remote Control for On the Move.
On the Move
Find the Remote Control for Rez's Lair. A bonus round can be reached by locating a series of cameras. Near this point is a way to jump up and over some helium bubbles. There are some golden flies on the right side of the wall in an arc pattern. Jump and cling to the left side wall, jump over the spikes, and climb up. The warp is located there.
Rez's Lair (Boss Level)
Kill Rez, save yourself. Note the bug that flies in the beginning animation. Gex must get that power-up. Avoid the items that Rez throws at Gex. When the television sets appear, climb the left wall and use them to jump over to the right wall. Tail whip the power-up, and eat it. Shoot at Rez, and avoid his defenses. Use the television sets to travel back to the left wall and get the power-up again. Repeat until Rez is hit five times.
Bonus round tip
Face to the right, and crouch. Snap Gex's tail just before the left barrel hits the ground. Timing is such that this move also kills the barrel in front of Gex. Only 27 barrels out of 30 need to be hit.
This secret world can only be reached by finding the bonus round in each world. Then by getting a perfect score in each round (except for Rezopolis which allows a score of 27 out of 30 barrels), a portion of the remote control to Planet X will be awarded. When all bonus rounds have been mastered, use the remote control to reach Planet X. After the Planet X level is complete, defeat Rez again to see the game's extended ending.
Ride the wall and dodge enemy spacecraft. Find the remote control.
Fall down the level and follow the trail of golden flies while avoiding the electric fields. Get the remote control.
Find the remote control. Navigate the shaft of alien gunners.
Newton's Fourth Law
Find the remote control. Learn to use the anti-gravity areas.
Head to Head
Super-Spring from one enemy to the next across the acid pools. Get the remote control.
The Project (Phat City)
Find the remote control in the maze. This is done by moving left at the beginning of the level, and jumping over the downward leading passage. Then follow the odd numbered golden fly clusters. After finding the remote, follow the passage to the left to find a warp to the exit. A secret game with a digitized man can be found by moving to the right at the beginning of the level, then following the odd numbered golden fly clusters. Tail whip him to make him throw up. After hitting him a few times, he will lie down. Another secret game can be found by moving to the left at the beginning of the level. Fall down the first passage and follow the odd numbered golden fly clusters.
Find the remote control and maneuver the helicopter platforms to the exit.
Dodge the oncoming beams and girders and get the video tape.