This page focuses on the differences between the HD and non-HD games (Tourist difficulty assumed).

General

Physics

• You no longer gain extra altitude when jumping up slopes.
• The speed boost when jumping down slopes is weaker.
• It is much easier to stand on top of enemies.
• You can prevent falling underwater by holding jump.
• You cannot get hit by cannon balls anymore.
• While walking down stairs in non-HD, you will be airborne and unable to jump. In HD this is not the case.
• In non-HD it is possible to get out of some of the levels and noclip to the exit. In HD you will just fall down until you are teleported back into the level.

Boosts and jumps

• Single bull boosts are much weaker, but getting hit by many bulls simultaneously may result in insane boosts.
• Bull jumping, bull riding, and super Kleer jumping are only possible in HD (see the Tricks section).
• Kleer boosts are stronger.
• Fish boosts are more effective.
• Kamikaze boosts have been removed.
• Harpy jumping is now possible.
• Cannon jumping is not possible.
• Higher difficulties no longer increase the power of the boosts.

Enemies

• Enemies now have different textures when damaged.
• Beheaded Rocketeer/Firecracker have new melee weapons.
• Kleers now always charge at you if close enough, instead of running next to you and melee attacking.
• Harpies do not get knocked back excessively when shot anymore.
• Harpies only have the gore explosion death animation.
• Highlander Aludran Reptiloids have higher health (20 rockets to 14 in non-HD).
• The fireballs of the Highlander Aludran Reptiloids can now be hit by the rocket launcher.
• The Electro-Fish's attack has longer range.
• Large Lava Golems have higher health (29 uncharged cannon balls to 23 in non-HD).

Weapons

• Colt/twin colts fire 30%/20% slower.
• Minigun does double damage, but fires twice as slow.
• Grenade Launcher fires 50% faster.
• Grenade Launcher now deals self damage.
• Fully charged Cannon fires 70% faster.
• Uncharged Cannon fires 267% faster.
• Switching weapons is much faster.
• The small delay from firing to when the actual shot appears is gone (Grenade Launcher, Laser, Cannon).

The First Encounter

Sand Canyon

• In non-HD you can go out of bounds in the starting area and noclip to the exit.

Tomb of Ramses III

Valley of the Kings

• The Aludran Reptiloid Highlander has more health in HD (20 rockets to 14 in non-HD).
• In non-HD you can go out of bounds in the gold ankh area and noclip to the exit.

Oasis

Dunes

Suburbs

Sewers

Metropolis

Alley of the Sphinxes

Karnak

Luxor

The Great Pyramid

Tricks

Bull jumping

Performed by standing on top of a bull and jumping when it is about to attack. The altitude reached is timing dependent, but a perfect bull jump gives roughly the same height as a standard bull boost in non-HD. Getting launched by two bulls throws you even higher into the air (double bull jumping).

Bull riding

The fastest single boost in the game. Just get on top of a Werebull while it is running. Usually does not work if on even ground with the Werebull, but easy to do if it comes charging down a hill. After a while it will stop to attack you, but it is possible to cancel out the attack by jumping. You can also let its attack hit you while you jump to perform a boosted bull jump.

Super Kleer jump

Involves riding on multiple Kleers to build up enough momentum to get boosted up a sloped wall. Can result in altitudes as high as a strong cannon jump in non-HD.

Turbo Laser

Bind primary fire to mouse wheel and the Lasergun can fire three times as fast, dealing 600 DPS (second only to Cannon).