The following are known Action Replay Codes for Coaster Works on SEGA Dreamcast (Dreamcast). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark

Memory Loss
74C591EB
00000063

G's
FDE9D46F
00000064

Speed
FDD1D46F
000000C8

Thrill
323966AE
000000C8

Blackout Riders
6F4329A8
00000063

Throw up People
AD1B1378
00000063

Safety
5BF735BE
000000C8

Queasy People
CCABA511
00000063