The player cannot go into third-person view and cannot jump as high as in the original game.Easy difficulty was like an easy Normal difficulty, self damage is on and ammo and health are at 100%, unlike in the original game where they are at 200%.Four difficulties: Easy, Normal, Hard and Serious.The spawning system was different enemies spawn in mid-air and stay there for a while with no different animations and then they drop down and start acting.Scrapped weapons could be seen in the controls options menu.45, 12 Gauge Pump-Action Shotgun, Double Barrel Coach Shotgun, XPML21 Rocket Launcher and the XM214-A Minigun. The Military Knife could slice faster than usual, but dealt lower damage.Beheaded Soldiers had a different sound set.Beheaded Firecrackers carried a chainsaw, like they do in Serious Sam HD.The Beheaded Rocketeer's weapon was different.Adult Arachnoids had a very different model.According to the only picture from Test 1 (bit earlier) time, of the scrapped level, it would be the level from the split-screen picture, there were the Ghost Buster and Pipebomb, and you can see the nukeball ammo which the SBC Cannon used. Interestingly enough, the player model in Test 1 had "COOL" written on their hand gloves, like in the earlier builds of the game, but in FPS view the gloves are like in the final version. In the first NETRICSA messages there is an Obelisk on the screen and models from beheaded zombies from earlier builds, the obelisk doesn't exist on the map but if you die close to the wall you can see the obelisk below the floor and few lakes, and other content cut from Test 1. It seems that Test 1 had few development phases, as there were supposed to be two scrapped weapons and one of the futuristic levels cut from the final game, from the Sky City part of the game, there were many left overs from those cut parts, it seems that the level was cut few months before the release of Test 1, as there are no NETRICSA messages about it (maybe it was even before Nettie). Also, in the Test 1 files, you can find the Nukeball ammo for the cannon, as seen in the level picture, so it seems that the SBC Cannon was supposed to be in Test 1, which makes Test 1 definitely a bigger preview than the final release of it. Also, there was supposed a futuristic level, but it was cut this would explain the other lights, textures, models which were not used in Test 1, also two ammo models which were not used in Test 1 - Grenades and Electricity which were supposed for 2 scrapped weapons, the Pipebomb and the XL4-P 'Ghostbuster' Beam Gun, the files of which were in the game. The following parts were the Amon Complex, The Sacred Lake and Main Temple of Amon-Ra. NETRICSA also says that the part of Karnak the player's currently in is "The First Pylon", one part of the Karnak temple complex from four (in the original beta, Karnak was split into 5 parts). The only level is Karnak Demo, which seems to be like in the final version but has many differences, textures, secret positions, etc.