I think you might have missed that you need Half-Life 2: Deathmatch in the main post.
If you haven’t got Deathmatch it’s just GPD£2.99 from Steam
Just type deathmatch into the Steam search box and select:
Half-Life 2: Deathmatch and pay up.
After download then as BadPrankster says
“put it in your half-life 2 deathmatch\hl2mp\maps folder.”

If you have Steam open, shut it and then restart it.
Then as Phillip says in the main post:
“start a Deathmatch game, choose Create Server and select sp_sawlife”
or you can start Deathmatch in your games tab.

This is a puzzle mod. A GOOD puzzle mod. Hardly on the level of R&D, but considering it was released 3 years prior, i think that’s a moot point.

The first puzzle was relatively easy, just requiring a bit of observation.

Second puzzle just required you to pay attention and keep at it.

Third puzzle was when things got difficult, up until then I thought all puzzles would always be contained within just one room.

Fouth puzzle was a short little aside, nice little pallet cleanser after puzzle #3, particularly frustrating if you were running short on time.

Fifth puzzle was easy, provided you didn’t panic, but was also the first real sign of being in danger.

Sixth puzzle was a pain in the butt. I figured out easily how to tell what path to take without getting hurt, but the path itself was so narrow that I died about 16 times before completing it successfully the first time.

The last puzzle was the simplest of all, but also the most ingenious.

I really think all of this could have easily been done in HL2 though, by merely disabling saves, but DM does ensure that pausing the game still lets the timer run down.

All in all, if you’ve got any interest in puzzle mods, this warrants at LEAST one play through. Both NVIDIA and ATI offer deals that allow you to download DeathMatch for free if you have their graphics card, and you only need a computer with that brand graphics card for the initial installation. After that you can use your profile on any computer and it’ll still work.

If puzzle mods aren’t your thing though, you’ll undoubtedly hate it.

I’m stuck at dogs toy, where is it, what is it? help!

Have you tried the video walkthroughs?

i need to download half life 2 multi?

Yes, you need to download and install Half-Life 2 Deathmatch.

This map is for personal or server use only. It is not to be uploaded or made available to other websites, without my permission.

Could I make a mod from this map? Thx 4 teh map!!
BadPrankster

You will need to contact the author. I can’t find the file at the moment but there should be an email address for MegaDude in the readme.

SPOILERS BELOW
This is how I solved the puzzles. I’m fairly certain most of these aren’t the official ways…

Puzzle 1: I didn’t even notice the numbers on the ceiling but I did notice the four people in the picture. I picked up the shape with four sides and fired it at the picture. It turns out any shape will break the picture.

Puzzle 2: Your host bangs on about 5 levers and 5 doors. After much trial and error I invented a new numeral system called binary. 5 in binary is 00101.

Puzzle 3: Stand in the doorway and shoot the light with the gravity gun a few times. Find the door that opened and from the doorway aim for the back right corner of the room. Grab the X with the gravity gun and take it back to the first room and from the doorway fire it into the room.

Puzzle 4: While your host is banging on about something grab one of the little gas tanks and drop it in the hole with the ball. Wait till he shuts up. Get out of the room quickly!

Puzzle 5: I can’t figure out an easy way to do this one. Pick up the metal box with the gravity gun and holding it in front of you work out which squares shoot flames and which ones don’t. DON’T walk on the ones that do!