HITMAN 2

If you only have access to the prologue/legacy levels, this achievement can be earned in the Freeform Training mission with the target Kalvin Ritter. This achievement does not require successfully completing the mission. When the mission starts, grab a remote explosive from the crates nearby and approach Kalvin as you would normally. Make a save file once you've reached him undetected.

For the ballistic kill, simply shoot him in the head and reload the save once the game confirms that the target has been eliminated.

For the explosive kill, throw the remote explosive at his feet and detonate it. Once again, reload the save when the game shows the target has been eliminated.

For the accident kill, you can use a crowbar to release the winch holding the lifeboat on the top floor of the map at the right time to crush Kalvin (and a few civilians) on the floor below. You can also poison his drink with emetic rat poison and follow him to the bathroom to drown him as he's getting sick.

Hitman 2 - Tools of the Trade Achievement

The video below shows me using the prologue/legacy levels, and using the Freeform Training mission with the target Kalvin Ritter. This achievement does not require you to complete the mission. When the mission starts, grab a remote explosive and the lockpick from the crates nearby and approach Kalvin like in the video . Make a save file once you've reached the bar undetected and Kalvin and Mr Norfolk are having a conversation.

For the ballistic kill follow Kalvin and Mr Norfolk and enter the room they are in by the window then simply shoot him in the head and reload the checkpoint once the game confirms that the target has been eliminated.

For the explosive kill, follow them and enter the room the same way and then throw the remote explosive at his feet and detonate it.

For the accident kill, restart the mission. You will require a crowbar which you can find at the back of the boat on a crate after you use the lockpick to get through the gate. You can use a crowbar to release the winch holding the lifeboat on the top floor of the map at the right time to crush Kalvin on the floor below, like I have done in the video. You can also poison his drink with emetic rat poison, which is found on the lower deck in the room next to where you find the yacht uniform, and follow him to the bathroom to drown him as he's getting sick.

Can be accomplished in the first mission, “Nightcall”. Kill the target by shooting her, throwing a frag grenade (which can be found in the safe room) and by throwing her off her balcony when she goes outside after brushing her teeth.

An easy way to do this quickly is to hide in the closet until her boyfriend takes a shower and the target brushes her teeth and then make a save file. Then simply kill the target in each of the 3 different ways. After exiting the mission, simply load your save and go onto the next method of killing the target. Easy.