Alien Syndrome (エイリアンシンドローム / 에이리언 신드롬)

Temporary invincibility

Wait until 272, 267, 232, 222, 171, 161, 131, or 121 is displayed on the counter, then collect the boxes with the question marks from the ships.

Action Replay codes

00C05403: Infinite lives (keeps showing 3)
00C07B06: Infinite time (keeps showing 305)
00C07501: Starts with only one hostage needed to open the exit
00C8ED01: Flame weapon

See the main page for Alien Syndrome (エイリアンシンドローム / 에이리언 신드롬)

Cheats

Alien Syndrome (エイリアン シンドローム / 에이리언 신드롬)

Temporary invincibility

Action Replay codes