Proto:Serious Sam: The First Encounter/Test 1/Level Changes

Missing Secrets
The secret near the front of the pool, the secret under the obelisk in the middle of the pool, the secret in the ammo-filled room before the last two fights, and the secrets in the final arena are missing.

Altered Generous Yard
The Generous Yard contains a Minigun along with two Bullet pickups, but the final version changed this to a Tommy Gun and one Bullet pickup.

Rocketeer on the Second Floor
In the final version, there is a Rocketeer (or Rocketeers, depending on the difficulty) on the second floor of the first room. In Test 1, they are not there.

First Secret
In Test 1, only one switch will activate the secret in the second room, while the final requires two.

There is also an exploit regarding the first secret; ever time the player hits the switch that lowers the secret platform, the game will count each button press an an individual secret. Theoretically, this could be used to farm as many points as the player desires, as each time a secret is rewarded, the player gains 10,000 points. This was obviously removed in the final version.

Gnaar
The first Gnaar the player sees after killing the Firecracker in the first room is a Male in the prototype, while the final uses a Female.

Texturing
Several texturing differences can be found between Test 1 and the final version. Some examples include the pillars in the area that has the Double Barrel Shotgun, the switches right before that area and the walls in the underwater portion of the Pool area.

Double Barrel Shotgun position
In Test 1, the Double Barrel Shotgun is located to the right of the semi-indoor area, while in the final it is just past the slope that leads to that area.

Shotgun Shells location
In Test 1, there is a box of Shotgun shells right next to the large porch in the middle of the outdoor switch area. This has been moved to the upper right-hand corner of that area in the final version.

Also, there is a Rocketeer in that area in Test 1. He has been removed in the final version.

Switched Rocketeer and Shells
In Test 1, there is a box of Shells and a Rocketeer behind the right switch in the large outdoors switch yard. This has been reversed in the final; they are now located behind the left switch and there is an additional box of shells.

Altered Finale
At the end of the level, a cutscene showing a large amount of Kleers running towards the player will play. In Test 1, the level ends right after the cutscene is played, but in the final version, they must be defeated in order to end the level.

Different Statues
The statues that line the path to each temple use a generic sphinx model in Test 1, while the final uses the gold dog model.