Here is the full list of all 374 Sleengster 2 achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Shoot 331 bullets
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Shoot 389 bullets
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Shoot 349 bullets
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Shoot 345 bullets
Shoot 334 bullets
Shoot 333 bullets
Shoot 327 bullets
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Shoot 272 bullets
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Shoot 264 bullets
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Shoot 259 bullets
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Shoot 237 bullet
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Shoot 226 bullet
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Shoot 255 bullet
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Shoot 174 bullets
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Shoot 154 bullets
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Shoot 134 bullets
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Shoot 128 bullets
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Shoot 50 bullets
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Shoot 38 bullets
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Shoot 1 bullet
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