1st Act are offering 4 free complete avatars in their hunt, 3 male and 1 female.
You have to click on the cutout avatar to receive the hunt HUD for that avatar. Wear the HUD and click each of the empty shard spaces to get a clue on the location of that particular shard. The clues refer to objects found in the sim, one shard for each avatar is located in the 1st Act store, the rest can be found in the Edge City Roleplay Area, including the Edge City Wastelands.
Once you have found the hunt object, click it to receive the shard. Once all the shard spaces are filled the HUD changes to a picture of the avatar selected in the store, and you get a teleport landmark back to the store. Once in the store, click on your chosen avatar again to receive the complete avatar.
Here is a picture of the 3 male avatars:
We have the Big Boss avatar on the left, the Solid Snake avatar in the middle, and the Squall avatar on the right of the picture. All three avatars are very detailed, and each one comes with prim attachments as well as skin, shape and hair. (Big Boss and Solid Snake also come with a stealth disguise, but I'll let you find out about that if you decide to take part in the hunt.)
I also had fun wearing each of the three skins with my favourite shape and hair. Here are the results:
Again slight variations in the way a skin is designed changes how a shape will appear inworld. Of course you can mix and match parts of the avatars to get a unique look.
Overall the 1st Act hunt was a fun activity, and once you've found your way around the sim looking for the shards to the first avatar, finding the shards for the other avatars is relatively quick, so you can complete the hunt in an afternoon.