From The TimeSplitters Wiki

Shrinking from the Cold is a pretty straight-forward match that introduces the Arcade mode: Shrink.

Briefing

The Time Portal has caused spacetime anomalies around the Dam. People have been shrinking! Lt. Frost, Nikolai and Sgt. Shivers have spiced up guard duty by making a game out of it. Remember, you won't win if there's anyone bigger than you!

Information

Match Info:

• Map: Siberia (TS2)
• Type: Shrink
• Character: Lt. Frost
• Enemies: Sgt. Shivers, Nikolai

Rewards:

• Silver: Shrink
• Gold: Private Sand, Sgt. Slate

Medal Requirements:

• Gold: 10 Kills in 3 min 0.0 secs
• Silver: 10 Kills in 4 min 30.0 secs
• Bronze: 10 Kills

Strategy

The Minigun is by far the best weapon in this match. It's located on top of the smallest building that was initially locked in Story Mode. After that, all that is required is to search for the other enemies and dispatch of them quickly. And be sure to hit the secondary fire button to automaticly spin the barrels.