The NSPCC has received £400,000 for its Full Stop campaign from the Microsoft Challenge Trophy 2002.
The event took place in Exmoor National Park and saw more than 100 teams take part. Among those competing were leading UK blue-chip companies, including Axa Sunlife and Hewlett-Packard, and public-sector organisations, including the Audit Commission, Crown Prosecution Service and Cardiff County Council.
The teams faced a daunting series of physical and mental challenges such as orienteering at night, wading waist deep through water and crossing a deep ravine using a rope bridge.
The final challenge saw participants taking part in a 1,000 ft ascent to the hills overlooking Minehead before heading down to the beach and setting off rockets to signal their finish.
Lloyds TSB won the challenge, closely followed by Fujitsu in second place.
The money was raised through corporate and individual sponsorship.