Trials

Trials (aka The Stages of Survival) is a recurring challenge that first appeared in Survivor: Laos as the final reward/immunity challenge, and has since appeared every season as the final immunity challenge.

Former
As making it's debut in Laos, the challenge was divided into three parts, each representing a different skill; luck, math, and words. After each section, the person who was last would be eliminated from the challenge, no longer competing for reward/immunity. This pattern would continue until the third and final part, where whoever placed first won reward and immunity.

Current
"Trials" had a renovation when it returned in Hawaii, following a different format. Like Laos, the Final 3/4 compete in a series of challenges, ranging anywhere from 2-6 challenges. Each one was a point value, with the more difficult tasks having higher point values, and vice versa. The contestant to collect the highest amount of points after all are completed is granted immunity, and guaranteed a spot in the Final 2/3.

Mini-Challenges
Over the seasons, Trials has incorporated several challenged clumped into one much broader challenge. Here below is a list of some of those:
 * Typing Maniac: A flash game (Cuba, Egypt, Switzerland)
 * Eye Opening: Contestants are to create an intro for the season (Hawaii, Cuba, Egypt, Nepal)
 * Crossword: A puzzle that involves knowing various things about the season (Switzerland, Egypt, Nepal, Revival)
 * Urn Uncovered: A quiz about who voted for who that season (Hawaii, Egypt, Nepal)
 * Dupligon Duel: A flash game (Revival)
 * Flag Maker: Contestants must create a flag representing the merged tribe (Revival)
 * Riddle of Fate: Contestants must solve a riddle (Hawaii, Cuba, Revival)

Trivia

 * This challenge, has only been used as the Final Immunity challenge.
 * 5/7 of the winners of this challenge have gone on to win the game.
 * CK is the only contestant to compete in this challenge twice.