E1M7 (Return to Phobos)

E1M7 is the seventh map of Return to Phobos. It was designed by Michael Kelsey.

Secrets

 * 1) Travelling west from the yellow key (which can be found by going north from the exit), you will reach a yellow door.  Just before this is a secret lift to the left (a dark grey wall flanked by light grey columns).  Lower this, and take it up.  The switch on the left opens up a teleporter (located south-east of the yellow key), and the switch on the right lowers the lift.  Continue ahead to reach an area with a rocket launcher, two boxes of rockets (multiplayer only) and two stimpacks.  The teleporter takes you to a podium from which you can jump to an area with a radiation suit, a medikit, a box of shells, and a computer map.  Both areas with items count as secrets. (sector 19)
 * 2) See #1. (sector 21)
 * 3) Go through the aforementioned yellow door, and take the lift in the south-west corner.  Jump onto the ledge and continue round to the west.  At the centre of this passage is a secret door (flanked by light grey supports) leading to a room with a switch, which counts as a secret.  The switch opens up a path over the columns in the nearby nukage, leading to a platform with a megaarmor and four health potions. (sector 82)
 * 4) In the north-west of the level is a nukage area with a blue-door locked room containing a plasma gun.  In the south-east corner of this area is a secret door (flanked by light grey supports) leading to a room with a green armor and 0-2 imps, and a link to another room with a partial invisibility and an imp (two on hard skill). (sector 119)
 * 5) The blue key is located in the north of the level.  In this room is a switch which opens a lift and a path to an outside area. (sector 156)
 * 6) Take the lift west of the start and go through the teleporter maze to the north-west corner.  Two doors open up – take the west one to a room with a window to a room with a supercharge on a platform.  This can be accessed by pressing the south-west wall, which is a secret door leading to a passage to the supercharge room.  The supercharge will lower on entering (the other end of this passage is also part of the same secret sector). (sector 52)

Current records
The records for the map on the Doomed Speed Demos Archive are:

Things
This level contains the following numbers of things per skill level: