Here are some cheats and tips for the game Terminator 2: The Arcade Game.
CODE KEY IN . . . EFFECT . . .
1 DD2A-476B Infinite missiles–player 1
2 DD2E-4DDB Infinite missiles–player 2
3 6D33-47D6 Infinite energy–player 1
4 6D3F-1DA6 Infinite energy–player 2
5 5E27-44A7 Shields lasts longer
6 D62B-4F67 Plasma Pulse Energizer lasts longer–player 1
7 D628-47D7 Plasma Pulse Energizer lasts longer–player 2
8 C267-47A5 Keep P.P.E. for that level once picked up–P1
9 C260-4765 Keep P.P.E. for that level once picked up–P2
10 D12D-4707 Get 6 missiles for each 1–player 1
11 DB2D-4707 Get 9 missiles for each 1–player 1
12 D124-4D67 Get 6 missiles for each 1–player 2
13 DB24-4D67 Get 6 missiles for each 1–player 2
14 C9B7-1407 Infinite gunpower–player 1
15 C9B9-17D7 Infinite gunpower–player 2
16 FDB3-476F Gunpower replenishes slower–player 1
17 FDB0-1F0F Gunpower replenishes slower–player 2
18 FD3E-C7A3 10 credits
19 F93E-C7A3 15 credits
20 4D3E-C7A3 20 credits
21 D12B-44A7 P.P.E. does extra damage–player 1
22 F42B-44A7 P.P.E. does massive damage–player 1